./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro --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 efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:55:48,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:55:48,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:55:48,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:55:48,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:55:48,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:55:48,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:55:48,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:55:48,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:55:48,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:55:48,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:55:48,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:55:48,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:55:48,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:55:48,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:55:48,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:55:48,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:55:48,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:55:48,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:55:48,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:55:48,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:55:48,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:55:48,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:55:48,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:55:48,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:55:48,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:55:48,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:55:48,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:55:48,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:55:48,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:55:48,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:55:48,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:55:48,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:55:48,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:55:48,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:55:48,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:55:48,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:55:48,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:55:48,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:55:48,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:55:48,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:55:48,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:55:48,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:55:48,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:55:48,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:55:48,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:55:48,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:55:48,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:55:48,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:55:48,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:55:48,822 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:55:48,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:55:48,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:55:48,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:55:48,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:55:48,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:55:48,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:55:48,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:55:48,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:55:48,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:55:48,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:55:48,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:55:48,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:55:48,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:48,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:55:48,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:55:48,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:55:48,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:55:48,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:55:48,829 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:55:48,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:55:48,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:55:48,830 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_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2022-11-18 20:55:49,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:55:49,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:55:49,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:55:49,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:55:49,225 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:55:49,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2022-11-18 20:55:49,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/data/33e8bd8cd/50dd6586704c4b61970da0f9053399c7/FLAGdf86373ac [2022-11-18 20:55:50,264 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:55:50,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2022-11-18 20:55:50,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/data/33e8bd8cd/50dd6586704c4b61970da0f9053399c7/FLAGdf86373ac [2022-11-18 20:55:50,706 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/data/33e8bd8cd/50dd6586704c4b61970da0f9053399c7 [2022-11-18 20:55:50,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:55:50,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:55:50,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:50,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:55:50,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:55:50,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:50" (1/1) ... [2022-11-18 20:55:50,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac9ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:50, skipping insertion in model container [2022-11-18 20:55:50,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:50" (1/1) ... [2022-11-18 20:55:50,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:55:50,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:55:51,207 WARN L234 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_2a2a3421-4518-4004-97b9-d286cedc71aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2022-11-18 20:55:51,214 WARN L234 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_2a2a3421-4518-4004-97b9-d286cedc71aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2022-11-18 20:55:52,163 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,165 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,167 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,168 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,173 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,188 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,189 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,191 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,191 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:52,651 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 20:55:52,653 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 20:55:52,655 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 20:55:52,657 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 20:55:52,664 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 20:55:52,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 20:55:52,669 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 20:55:52,672 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 20:55:52,674 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 20:55:52,677 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 20:55:52,897 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 20:55:53,029 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,030 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:53,215 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:55:53,246 WARN L234 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_2a2a3421-4518-4004-97b9-d286cedc71aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2022-11-18 20:55:53,246 WARN L234 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_2a2a3421-4518-4004-97b9-d286cedc71aa/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2022-11-18 20:55:53,315 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,315 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,316 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,318 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,319 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,337 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,341 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,343 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,343 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,398 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-18 20:55:53,399 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-18 20:55:53,400 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-18 20:55:53,401 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-18 20:55:53,402 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-18 20:55:53,403 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-18 20:55:53,403 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-18 20:55:53,404 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-18 20:55:53,404 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-18 20:55:53,407 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-18 20:55:53,436 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-18 20:55:53,557 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,557 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-18 20:55:53,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:53,821 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:55:53,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53 WrapperNode [2022-11-18 20:55:53,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:53,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:53,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:55:53,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:55:53,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:53,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,067 INFO L138 Inliner]: procedures = 691, calls = 2665, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 886 [2022-11-18 20:55:54,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:54,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:55:54,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:55:54,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:55:54,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:55:54,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:55:54,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:55:54,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:55:54,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (1/1) ... [2022-11-18 20:55:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:54,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:55:54,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:55:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-18 20:55:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-18 20:55:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-18 20:55:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:55:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-18 20:55:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-18 20:55:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:55:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:55:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:55:54,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:55:54,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:55:54,272 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-11-18 20:55:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-11-18 20:55:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:55:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2022-11-18 20:55:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2022-11-18 20:55:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:55:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:55:54,273 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-18 20:55:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-18 20:55:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-18 20:55:54,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-18 20:55:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:55:54,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:55:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:55:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:55:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-18 20:55:54,276 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-18 20:55:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-18 20:55:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-18 20:55:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-18 20:55:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-18 20:55:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-18 20:55:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2022-11-18 20:55:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2022-11-18 20:55:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:55:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2022-11-18 20:55:54,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2022-11-18 20:55:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:55:54,670 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:55:54,672 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:55:56,146 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:55:56,158 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:55:56,159 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 20:55:56,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:56 BoogieIcfgContainer [2022-11-18 20:55:56,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:55:56,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:55:56,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:55:56,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:55:56,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:55:50" (1/3) ... [2022-11-18 20:55:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756b095a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:56, skipping insertion in model container [2022-11-18 20:55:56,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:53" (2/3) ... [2022-11-18 20:55:56,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756b095a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:56, skipping insertion in model container [2022-11-18 20:55:56,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:56" (3/3) ... [2022-11-18 20:55:56,171 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2022-11-18 20:55:56,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:55:56,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:55:56,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:56,268 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6c206cae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:56,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:55:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-18 20:55:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 20:55:56,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:56,288 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 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] [2022-11-18 20:55:56,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1419889978, now seen corresponding path program 1 times [2022-11-18 20:55:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:56,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34141779] [2022-11-18 20:55:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:56,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:55:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:55:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:55:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:55:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:55:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 20:55:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:55:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:55:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:55:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:55:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:55:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:55:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:55:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:55:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:55:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 20:55:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 20:55:57,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:57,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34141779] [2022-11-18 20:55:57,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34141779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:57,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:57,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:55:57,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021736041] [2022-11-18 20:55:57,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:55:57,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:55:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:57,485 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:55:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:58,251 INFO L93 Difference]: Finished difference Result 304 states and 439 transitions. [2022-11-18 20:55:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2022-11-18 20:55:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:58,271 INFO L225 Difference]: With dead ends: 304 [2022-11-18 20:55:58,271 INFO L226 Difference]: Without dead ends: 150 [2022-11-18 20:55:58,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:58,288 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 225 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:58,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 172 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:55:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-18 20:55:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-11-18 20:55:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 89 states have internal predecessors, (107), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-18 20:55:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2022-11-18 20:55:58,369 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 113 [2022-11-18 20:55:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:58,370 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2022-11-18 20:55:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:55:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2022-11-18 20:55:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-18 20:55:58,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:58,385 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 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] [2022-11-18 20:55:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:55:58,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -254215752, now seen corresponding path program 1 times [2022-11-18 20:55:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778317892] [2022-11-18 20:55:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:55:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:55:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:55:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:55:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:55:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-18 20:55:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:55:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:55:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:55:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:55:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:55:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:55:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:55:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:55:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:55:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:55:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 20:55:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:55:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:59,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778317892] [2022-11-18 20:55:59,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778317892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133962873] [2022-11-18 20:55:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:59,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:59,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:56:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:56:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-18 20:56:00,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:00,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133962873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:00,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:00,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-18 20:56:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960227616] [2022-11-18 20:56:00,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:56:00,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:56:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:56:00,382 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-18 20:56:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:00,746 INFO L93 Difference]: Finished difference Result 292 states and 395 transitions. [2022-11-18 20:56:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:56:00,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2022-11-18 20:56:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:00,749 INFO L225 Difference]: With dead ends: 292 [2022-11-18 20:56:00,750 INFO L226 Difference]: Without dead ends: 151 [2022-11-18 20:56:00,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:56:00,752 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 214 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:00,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 425 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:56:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-18 20:56:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-18 20:56:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2022-11-18 20:56:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 206 transitions. [2022-11-18 20:56:00,772 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 206 transitions. Word has length 113 [2022-11-18 20:56:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:00,777 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 206 transitions. [2022-11-18 20:56:00,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-18 20:56:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 206 transitions. [2022-11-18 20:56:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 20:56:00,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:00,786 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:00,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:00,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1731779843, now seen corresponding path program 1 times [2022-11-18 20:56:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362148603] [2022-11-18 20:56:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:00,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:56:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 20:56:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 20:56:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 20:56:02,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:02,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362148603] [2022-11-18 20:56:02,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362148603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734889981] [2022-11-18 20:56:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:02,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:02,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:02,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:02,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:56:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:56:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:56:03,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734889981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:03,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-18 20:56:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468507363] [2022-11-18 20:56:03,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:56:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:56:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:56:03,008 INFO L87 Difference]: Start difference. First operand 151 states and 206 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-18 20:56:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:03,346 INFO L93 Difference]: Finished difference Result 247 states and 339 transitions. [2022-11-18 20:56:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:56:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2022-11-18 20:56:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:03,350 INFO L225 Difference]: With dead ends: 247 [2022-11-18 20:56:03,350 INFO L226 Difference]: Without dead ends: 151 [2022-11-18 20:56:03,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:56:03,352 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 229 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:03,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 553 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:56:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-18 20:56:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-18 20:56:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2022-11-18 20:56:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2022-11-18 20:56:03,369 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 119 [2022-11-18 20:56:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:03,370 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2022-11-18 20:56:03,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-18 20:56:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2022-11-18 20:56:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-18 20:56:03,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:03,373 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:03,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:03,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:03,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1773749607, now seen corresponding path program 2 times [2022-11-18 20:56:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55663314] [2022-11-18 20:56:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 20:56:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:56:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-18 20:56:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 20:56:04,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55663314] [2022-11-18 20:56:04,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55663314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573924033] [2022-11-18 20:56:04,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:56:04,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:04,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:04,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:56:05,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:56:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:56:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 2322 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:56:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-18 20:56:05,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573924033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:05,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-18 20:56:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724233114] [2022-11-18 20:56:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:56:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:56:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:56:05,179 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 20:56:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:05,297 INFO L93 Difference]: Finished difference Result 163 states and 223 transitions. [2022-11-18 20:56:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:56:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2022-11-18 20:56:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:05,300 INFO L225 Difference]: With dead ends: 163 [2022-11-18 20:56:05,300 INFO L226 Difference]: Without dead ends: 161 [2022-11-18 20:56:05,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:56:05,301 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 23 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:05,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1345 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:56:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-18 20:56:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-11-18 20:56:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 99 states have internal predecessors, (115), 47 states have call successors, (47), 14 states have call predecessors, (47), 16 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2022-11-18 20:56:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 220 transitions. [2022-11-18 20:56:05,330 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 220 transitions. Word has length 131 [2022-11-18 20:56:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:05,332 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 220 transitions. [2022-11-18 20:56:05,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 20:56:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 220 transitions. [2022-11-18 20:56:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-18 20:56:05,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:05,336 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 20:56:05,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:05,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:05,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:05,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1277784929, now seen corresponding path program 1 times [2022-11-18 20:56:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:05,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059872811] [2022-11-18 20:56:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 20:56:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:56:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-18 20:56:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 20:56:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059872811] [2022-11-18 20:56:06,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059872811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:06,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903987267] [2022-11-18 20:56:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:06,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:06,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:56:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:07,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:56:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:56:07,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:07,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903987267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:07,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:07,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-18 20:56:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819378329] [2022-11-18 20:56:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:56:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:56:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:56:07,318 INFO L87 Difference]: Start difference. First operand 160 states and 220 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-18 20:56:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:07,802 INFO L93 Difference]: Finished difference Result 280 states and 386 transitions. [2022-11-18 20:56:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:56:07,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2022-11-18 20:56:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:07,808 INFO L225 Difference]: With dead ends: 280 [2022-11-18 20:56:07,809 INFO L226 Difference]: Without dead ends: 157 [2022-11-18 20:56:07,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:56:07,811 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 228 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:07,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 681 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:56:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-18 20:56:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-18 20:56:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 96 states have internal predecessors, (112), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2022-11-18 20:56:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-11-18 20:56:07,847 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 135 [2022-11-18 20:56:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:07,847 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-11-18 20:56:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-18 20:56:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-11-18 20:56:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 20:56:07,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:07,851 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:07,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:08,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:08,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1196248684, now seen corresponding path program 1 times [2022-11-18 20:56:08,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:08,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287415661] [2022-11-18 20:56:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:08,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:56:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 20:56:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-18 20:56:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-18 20:56:09,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:09,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287415661] [2022-11-18 20:56:09,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287415661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:09,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:56:09,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:56:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220650252] [2022-11-18 20:56:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:09,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:56:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:56:09,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:56:09,844 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 20:56:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:10,902 INFO L93 Difference]: Finished difference Result 334 states and 471 transitions. [2022-11-18 20:56:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:56:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2022-11-18 20:56:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:10,904 INFO L225 Difference]: With dead ends: 334 [2022-11-18 20:56:10,904 INFO L226 Difference]: Without dead ends: 184 [2022-11-18 20:56:10,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:56:10,906 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 151 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:10,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 381 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:56:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-18 20:56:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2022-11-18 20:56:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 99 states have (on average 1.202020202020202) internal successors, (119), 101 states have internal predecessors, (119), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2022-11-18 20:56:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 220 transitions. [2022-11-18 20:56:10,927 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 220 transitions. Word has length 141 [2022-11-18 20:56:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:10,929 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 220 transitions. [2022-11-18 20:56:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 20:56:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 220 transitions. [2022-11-18 20:56:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 20:56:10,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:10,933 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:10,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:56:10,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1454414122, now seen corresponding path program 1 times [2022-11-18 20:56:10,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711349496] [2022-11-18 20:56:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:56:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 20:56:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:16,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-18 20:56:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 20:56:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:16,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711349496] [2022-11-18 20:56:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711349496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:16,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665559475] [2022-11-18 20:56:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:16,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:16,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:16,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:16,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:56:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 20:56:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:17,290 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 20:56:17,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-11-18 20:56:17,889 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 14 [2022-11-18 20:56:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:56:18,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665559475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:18,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:18,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 30 [2022-11-18 20:56:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117018772] [2022-11-18 20:56:18,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:18,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:56:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:56:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:56:18,826 INFO L87 Difference]: Start difference. First operand 162 states and 220 transitions. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-18 20:56:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:20,248 INFO L93 Difference]: Finished difference Result 348 states and 490 transitions. [2022-11-18 20:56:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:56:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 141 [2022-11-18 20:56:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:20,252 INFO L225 Difference]: With dead ends: 348 [2022-11-18 20:56:20,252 INFO L226 Difference]: Without dead ends: 244 [2022-11-18 20:56:20,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:56:20,255 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 122 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:20,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 719 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1107 Invalid, 0 Unknown, 446 Unchecked, 1.1s Time] [2022-11-18 20:56:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-18 20:56:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-11-18 20:56:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 129 states have (on average 1.2093023255813953) internal successors, (156), 133 states have internal predecessors, (156), 51 states have call successors, (51), 17 states have call predecessors, (51), 20 states have return successors, (65), 50 states have call predecessors, (65), 50 states have call successors, (65) [2022-11-18 20:56:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 272 transitions. [2022-11-18 20:56:20,280 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 272 transitions. Word has length 141 [2022-11-18 20:56:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:20,281 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 272 transitions. [2022-11-18 20:56:20,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-18 20:56:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 272 transitions. [2022-11-18 20:56:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-18 20:56:20,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:20,284 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:20,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:56:20,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1438895404, now seen corresponding path program 1 times [2022-11-18 20:56:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:20,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036375928] [2022-11-18 20:56:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:56:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 20:56:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-11-18 20:56:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-18 20:56:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036375928] [2022-11-18 20:56:21,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036375928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833183875] [2022-11-18 20:56:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:21,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:21,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:21,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:21,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:56:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:21,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:56:21,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:56:21,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833183875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:21,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:21,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-18 20:56:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865230988] [2022-11-18 20:56:21,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:56:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:56:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:56:21,744 INFO L87 Difference]: Start difference. First operand 201 states and 272 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:56:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:21,794 INFO L93 Difference]: Finished difference Result 404 states and 553 transitions. [2022-11-18 20:56:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:56:21,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2022-11-18 20:56:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:21,797 INFO L225 Difference]: With dead ends: 404 [2022-11-18 20:56:21,797 INFO L226 Difference]: Without dead ends: 210 [2022-11-18 20:56:21,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:56:21,799 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 20 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:21,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 583 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:56:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-18 20:56:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 197. [2022-11-18 20:56:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 126 states have (on average 1.1984126984126984) internal successors, (151), 129 states have internal predecessors, (151), 51 states have call successors, (51), 17 states have call predecessors, (51), 19 states have return successors, (62), 50 states have call predecessors, (62), 50 states have call successors, (62) [2022-11-18 20:56:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 264 transitions. [2022-11-18 20:56:21,829 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 264 transitions. Word has length 141 [2022-11-18 20:56:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:21,830 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 264 transitions. [2022-11-18 20:56:21,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:56:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 264 transitions. [2022-11-18 20:56:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-18 20:56:21,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:21,834 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-18 20:56:21,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:56:22,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1163586706, now seen corresponding path program 1 times [2022-11-18 20:56:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966904656] [2022-11-18 20:56:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:56:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:56:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-18 20:56:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-18 20:56:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-18 20:56:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:24,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 20:56:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-18 20:56:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-18 20:56:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966904656] [2022-11-18 20:56:25,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966904656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352776746] [2022-11-18 20:56:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:25,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:25,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:56:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:56:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:26,531 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-11-18 20:56:26,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 80 [2022-11-18 20:56:26,734 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:56:26,734 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 33 [2022-11-18 20:56:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 108 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:56:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:27,547 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-18 20:56:27,699 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 20:56:27,700 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-18 20:56:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-18 20:56:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352776746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:27,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:27,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-11-18 20:56:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416588191] [2022-11-18 20:56:27,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:56:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:56:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:56:27,767 INFO L87 Difference]: Start difference. First operand 197 states and 264 transitions. Second operand has 30 states, 28 states have (on average 4.5) internal successors, (126), 26 states have internal predecessors, (126), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:56:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:31,298 INFO L93 Difference]: Finished difference Result 493 states and 726 transitions. [2022-11-18 20:56:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:56:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.5) internal successors, (126), 26 states have internal predecessors, (126), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) Word has length 148 [2022-11-18 20:56:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:31,302 INFO L225 Difference]: With dead ends: 493 [2022-11-18 20:56:31,303 INFO L226 Difference]: Without dead ends: 380 [2022-11-18 20:56:31,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 319 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:56:31,306 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 441 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:31,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2828 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1654 Invalid, 0 Unknown, 519 Unchecked, 2.2s Time] [2022-11-18 20:56:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-18 20:56:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 256. [2022-11-18 20:56:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 163 states have (on average 1.1901840490797546) internal successors, (194), 166 states have internal predecessors, (194), 69 states have call successors, (69), 20 states have call predecessors, (69), 23 states have return successors, (99), 69 states have call predecessors, (99), 68 states have call successors, (99) [2022-11-18 20:56:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 362 transitions. [2022-11-18 20:56:31,349 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 362 transitions. Word has length 148 [2022-11-18 20:56:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:31,350 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 362 transitions. [2022-11-18 20:56:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.5) internal successors, (126), 26 states have internal predecessors, (126), 13 states have call successors, (50), 8 states have call predecessors, (50), 8 states have return successors, (48), 11 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:56:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 362 transitions. [2022-11-18 20:56:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-18 20:56:31,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:31,353 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-18 20:56:31,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:31,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:31,563 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash -454412494, now seen corresponding path program 2 times [2022-11-18 20:56:31,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:31,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087080289] [2022-11-18 20:56:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:31,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:56:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:56:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:56:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:56:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:56:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:56:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:56:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-18 20:56:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 20:56:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 20:56:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 20:56:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087080289] [2022-11-18 20:56:36,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087080289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322348091] [2022-11-18 20:56:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:56:36,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:36,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:36,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:56:37,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:56:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:56:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 20:56:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:38,628 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:56:38,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 20:56:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 120 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:56:39,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:40,727 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-18 20:56:40,905 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 20:56:40,905 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-18 20:56:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:56:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322348091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:40,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:40,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 38 [2022-11-18 20:56:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304570935] [2022-11-18 20:56:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:56:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:56:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:56:40,960 INFO L87 Difference]: Start difference. First operand 256 states and 362 transitions. Second operand has 38 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 15 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) [2022-11-18 20:56:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:48,825 INFO L93 Difference]: Finished difference Result 696 states and 1120 transitions. [2022-11-18 20:56:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:56:48,830 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 15 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) Word has length 145 [2022-11-18 20:56:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:48,835 INFO L225 Difference]: With dead ends: 696 [2022-11-18 20:56:48,835 INFO L226 Difference]: Without dead ends: 539 [2022-11-18 20:56:48,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 311 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=435, Invalid=4121, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:56:48,838 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 539 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 4634 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 6136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 4634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 990 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:48,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1699 Invalid, 6136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 4634 Invalid, 0 Unknown, 990 Unchecked, 5.7s Time] [2022-11-18 20:56:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-18 20:56:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 317. [2022-11-18 20:56:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 202 states have (on average 1.183168316831683) internal successors, (239), 208 states have internal predecessors, (239), 87 states have call successors, (87), 22 states have call predecessors, (87), 27 states have return successors, (147), 86 states have call predecessors, (147), 86 states have call successors, (147) [2022-11-18 20:56:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 473 transitions. [2022-11-18 20:56:48,896 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 473 transitions. Word has length 145 [2022-11-18 20:56:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:48,897 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 473 transitions. [2022-11-18 20:56:48,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 35 states have internal predecessors, (151), 15 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 15 states have call successors, (44) [2022-11-18 20:56:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 473 transitions. [2022-11-18 20:56:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-18 20:56:48,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:48,901 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:48,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:49,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1465599814, now seen corresponding path program 3 times [2022-11-18 20:56:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884281127] [2022-11-18 20:56:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:49,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:56:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:56:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:56:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 20:56:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 20:56:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:56:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:56:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 20:56:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 20:56:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-18 20:56:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 20:56:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884281127] [2022-11-18 20:56:50,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884281127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370823511] [2022-11-18 20:56:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:56:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:50,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:50,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:56:52,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:56:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:56:52,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:56:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 20:56:52,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:56:52,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370823511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:52,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 14 [2022-11-18 20:56:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675898827] [2022-11-18 20:56:52,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:56:52,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:56:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:56:52,412 INFO L87 Difference]: Start difference. First operand 317 states and 473 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-18 20:56:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:52,651 INFO L93 Difference]: Finished difference Result 507 states and 787 transitions. [2022-11-18 20:56:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:56:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 149 [2022-11-18 20:56:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:52,658 INFO L225 Difference]: With dead ends: 507 [2022-11-18 20:56:52,658 INFO L226 Difference]: Without dead ends: 332 [2022-11-18 20:56:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:56:52,662 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 13 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:52,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1463 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:56:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-18 20:56:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2022-11-18 20:56:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 210 states have (on average 1.1761904761904762) internal successors, (247), 218 states have internal predecessors, (247), 87 states have call successors, (87), 22 states have call predecessors, (87), 29 states have return successors, (169), 86 states have call predecessors, (169), 86 states have call successors, (169) [2022-11-18 20:56:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 503 transitions. [2022-11-18 20:56:52,721 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 503 transitions. Word has length 149 [2022-11-18 20:56:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:52,725 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 503 transitions. [2022-11-18 20:56:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-18 20:56:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 503 transitions. [2022-11-18 20:56:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-18 20:56:52,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:52,729 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-18 20:56:52,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:52,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:52,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash -994019018, now seen corresponding path program 1 times [2022-11-18 20:56:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:52,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856622253] [2022-11-18 20:56:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:52,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:56:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:56:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:56:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:56:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:56:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:56:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:57:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:57:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:57:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:00,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:57:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:00,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-18 20:57:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:57:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-18 20:57:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:57:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 20:57:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 20:57:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-18 20:57:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-18 20:57:01,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:01,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856622253] [2022-11-18 20:57:01,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856622253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:01,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727408147] [2022-11-18 20:57:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:01,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:01,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:01,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:01,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:57:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:57:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 20:57:02,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:02,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727408147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:02,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:02,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [30] total 37 [2022-11-18 20:57:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505850148] [2022-11-18 20:57:02,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:57:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:57:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:57:02,375 INFO L87 Difference]: Start difference. First operand 327 states and 503 transitions. Second operand has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-18 20:57:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:02,645 INFO L93 Difference]: Finished difference Result 550 states and 850 transitions. [2022-11-18 20:57:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:57:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 152 [2022-11-18 20:57:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:02,649 INFO L225 Difference]: With dead ends: 550 [2022-11-18 20:57:02,649 INFO L226 Difference]: Without dead ends: 332 [2022-11-18 20:57:02,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:57:02,652 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 13 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:02,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1468 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-18 20:57:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2022-11-18 20:57:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 210 states have (on average 1.1761904761904762) internal successors, (247), 218 states have internal predecessors, (247), 87 states have call successors, (87), 22 states have call predecessors, (87), 29 states have return successors, (161), 86 states have call predecessors, (161), 86 states have call successors, (161) [2022-11-18 20:57:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 495 transitions. [2022-11-18 20:57:02,700 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 495 transitions. Word has length 152 [2022-11-18 20:57:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:02,701 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 495 transitions. [2022-11-18 20:57:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-18 20:57:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 495 transitions. [2022-11-18 20:57:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-18 20:57:02,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:02,705 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-18 20:57:02,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:02,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:02,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1951317313, now seen corresponding path program 1 times [2022-11-18 20:57:02,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:02,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131885647] [2022-11-18 20:57:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:02,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:57:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:57:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:57:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:57:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:57:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:57:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:57:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 20:57:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 20:57:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:57:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:57:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 20:57:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-18 20:57:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:57:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-18 20:57:03,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131885647] [2022-11-18 20:57:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131885647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524473067] [2022-11-18 20:57:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:03,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:03,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:03,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:03,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:57:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2856 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:57:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-18 20:57:04,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:04,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524473067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:04,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:04,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-18 20:57:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977482842] [2022-11-18 20:57:04,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:04,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:57:04,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:57:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:57:04,109 INFO L87 Difference]: Start difference. First operand 327 states and 495 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:57:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:04,175 INFO L93 Difference]: Finished difference Result 665 states and 1039 transitions. [2022-11-18 20:57:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:57:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 151 [2022-11-18 20:57:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:04,180 INFO L225 Difference]: With dead ends: 665 [2022-11-18 20:57:04,180 INFO L226 Difference]: Without dead ends: 345 [2022-11-18 20:57:04,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:57:04,185 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 9 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:04,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 579 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:57:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-18 20:57:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2022-11-18 20:57:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 216 states have (on average 1.1666666666666667) internal successors, (252), 224 states have internal predecessors, (252), 87 states have call successors, (87), 22 states have call predecessors, (87), 29 states have return successors, (161), 86 states have call predecessors, (161), 86 states have call successors, (161) [2022-11-18 20:57:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 500 transitions. [2022-11-18 20:57:04,232 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 500 transitions. Word has length 151 [2022-11-18 20:57:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:04,232 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 500 transitions. [2022-11-18 20:57:04,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-18 20:57:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 500 transitions. [2022-11-18 20:57:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 20:57:04,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:04,237 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-18 20:57:04,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:04,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:04,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1784049345, now seen corresponding path program 1 times [2022-11-18 20:57:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:04,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067344965] [2022-11-18 20:57:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:04,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:05,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:57:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:05,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:57:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:57:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:57:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:57:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:57:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:57:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:57:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-18 20:57:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:57:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-18 20:57:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:57:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 20:57:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:57:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 20:57:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-18 20:57:06,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:06,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067344965] [2022-11-18 20:57:06,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067344965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412238030] [2022-11-18 20:57:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:06,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:06,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:06,418 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:06,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:57:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2901 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:57:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:07,193 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 20:57:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-18 20:57:07,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:07,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412238030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:07,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:07,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-18 20:57:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318177260] [2022-11-18 20:57:07,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:07,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:57:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:57:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:57:07,606 INFO L87 Difference]: Start difference. First operand 333 states and 500 transitions. Second operand has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-18 20:57:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:07,897 INFO L93 Difference]: Finished difference Result 671 states and 998 transitions. [2022-11-18 20:57:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:57:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 154 [2022-11-18 20:57:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:07,901 INFO L225 Difference]: With dead ends: 671 [2022-11-18 20:57:07,901 INFO L226 Difference]: Without dead ends: 348 [2022-11-18 20:57:07,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:57:07,904 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 42 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:07,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1455 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-11-18 20:57:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-18 20:57:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2022-11-18 20:57:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 227 states have (on average 1.171806167400881) internal successors, (266), 234 states have internal predecessors, (266), 87 states have call successors, (87), 23 states have call predecessors, (87), 29 states have return successors, (160), 86 states have call predecessors, (160), 86 states have call successors, (160) [2022-11-18 20:57:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 513 transitions. [2022-11-18 20:57:07,949 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 513 transitions. Word has length 154 [2022-11-18 20:57:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:07,949 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 513 transitions. [2022-11-18 20:57:07,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.166666666666667) internal successors, (74), 10 states have internal predecessors, (74), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-18 20:57:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 513 transitions. [2022-11-18 20:57:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-18 20:57:07,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:07,953 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-18 20:57:07,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:08,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:08,163 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2066227203, now seen corresponding path program 1 times [2022-11-18 20:57:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:08,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819110337] [2022-11-18 20:57:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:08,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:57:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:57:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:57:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:57:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:08,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:57:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:57:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:57:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 20:57:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 20:57:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:57:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:57:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 20:57:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-18 20:57:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:57:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 20:57:09,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:09,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819110337] [2022-11-18 20:57:09,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819110337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:09,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998648848] [2022-11-18 20:57:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:09,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:09,110 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:09,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:57:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 20:57:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:09,807 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 20:57:09,996 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 20:57:11,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-18 20:57:11,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:57:11,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-11-18 20:57:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 20:57:11,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:11,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998648848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:11,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:11,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 31 [2022-11-18 20:57:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550087971] [2022-11-18 20:57:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:11,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:57:11,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:57:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:57:11,485 INFO L87 Difference]: Start difference. First operand 344 states and 513 transitions. Second operand has 21 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 7 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-18 20:57:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:13,461 INFO L93 Difference]: Finished difference Result 731 states and 1116 transitions. [2022-11-18 20:57:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:57:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 7 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 151 [2022-11-18 20:57:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:13,466 INFO L225 Difference]: With dead ends: 731 [2022-11-18 20:57:13,466 INFO L226 Difference]: Without dead ends: 499 [2022-11-18 20:57:13,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:57:13,469 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 232 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1113 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:13,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 599 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1445 Invalid, 0 Unknown, 1113 Unchecked, 1.4s Time] [2022-11-18 20:57:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-18 20:57:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 485. [2022-11-18 20:57:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 305 states have (on average 1.1639344262295082) internal successors, (355), 314 states have internal predecessors, (355), 138 states have call successors, (138), 33 states have call predecessors, (138), 41 states have return successors, (257), 137 states have call predecessors, (257), 136 states have call successors, (257) [2022-11-18 20:57:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 750 transitions. [2022-11-18 20:57:13,543 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 750 transitions. Word has length 151 [2022-11-18 20:57:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:13,543 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 750 transitions. [2022-11-18 20:57:13,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 16 states have internal predecessors, (81), 7 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-18 20:57:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 750 transitions. [2022-11-18 20:57:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-18 20:57:13,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:13,548 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-18 20:57:13,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:57:13,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:13,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1831542855, now seen corresponding path program 2 times [2022-11-18 20:57:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:13,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607559585] [2022-11-18 20:57:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:57:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:57:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:57:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:57:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:57:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:57:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-18 20:57:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-18 20:57:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-18 20:57:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-18 20:57:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-18 20:57:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 20:57:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-18 20:57:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 20:57:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 20:57:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607559585] [2022-11-18 20:57:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607559585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:14,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782909018] [2022-11-18 20:57:14,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:57:14,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:14,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:57:16,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:57:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:57:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:16,098 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 20:57:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:16,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:57:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:16,936 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-18 20:57:16,936 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 66 [2022-11-18 20:57:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 121 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:57:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:57:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782909018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:19,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:19,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 15] total 43 [2022-11-18 20:57:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116098908] [2022-11-18 20:57:19,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:57:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:57:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1661, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:57:19,637 INFO L87 Difference]: Start difference. First operand 485 states and 750 transitions. Second operand has 43 states, 41 states have (on average 4.585365853658536) internal successors, (188), 39 states have internal predecessors, (188), 12 states have call successors, (47), 9 states have call predecessors, (47), 12 states have return successors, (45), 11 states have call predecessors, (45), 12 states have call successors, (45) [2022-11-18 20:57:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:38,551 INFO L93 Difference]: Finished difference Result 1354 states and 2515 transitions. [2022-11-18 20:57:38,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-18 20:57:38,552 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.585365853658536) internal successors, (188), 39 states have internal predecessors, (188), 12 states have call successors, (47), 9 states have call predecessors, (47), 12 states have return successors, (45), 11 states have call predecessors, (45), 12 states have call successors, (45) Word has length 151 [2022-11-18 20:57:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:38,562 INFO L225 Difference]: With dead ends: 1354 [2022-11-18 20:57:38,563 INFO L226 Difference]: Without dead ends: 804 [2022-11-18 20:57:38,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 314 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4985 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2184, Invalid=16998, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 20:57:38,573 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 725 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 10111 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 13413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 10111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2595 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:38,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 3329 Invalid, 13413 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [707 Valid, 10111 Invalid, 0 Unknown, 2595 Unchecked, 10.0s Time] [2022-11-18 20:57:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-11-18 20:57:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 553. [2022-11-18 20:57:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 349 states have (on average 1.1318051575931232) internal successors, (395), 363 states have internal predecessors, (395), 164 states have call successors, (164), 26 states have call predecessors, (164), 39 states have return successors, (460), 163 states have call predecessors, (460), 163 states have call successors, (460) [2022-11-18 20:57:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1019 transitions. [2022-11-18 20:57:38,694 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1019 transitions. Word has length 151 [2022-11-18 20:57:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:38,695 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 1019 transitions. [2022-11-18 20:57:38,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.585365853658536) internal successors, (188), 39 states have internal predecessors, (188), 12 states have call successors, (47), 9 states have call predecessors, (47), 12 states have return successors, (45), 11 states have call predecessors, (45), 12 states have call successors, (45) [2022-11-18 20:57:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1019 transitions. [2022-11-18 20:57:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:57:38,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:38,700 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 20:57:38,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:57:38,921 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash -358188430, now seen corresponding path program 2 times [2022-11-18 20:57:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780441734] [2022-11-18 20:57:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:57:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:57:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:57:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:57:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:57:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:57:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:43,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:57:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:57:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:57:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 20:57:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:57:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-18 20:57:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:57:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 20:57:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:57:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:57:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 20:57:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-18 20:57:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780441734] [2022-11-18 20:57:44,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780441734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531915511] [2022-11-18 20:57:44,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:57:44,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:44,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:44,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:57:45,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:57:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2910 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:57:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:45,990 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 20:57:46,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 20:57:46,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-11-18 20:57:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 20:57:47,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:47,726 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-18 20:57:47,913 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 20:57:47,914 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-18 20:57:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-18 20:57:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531915511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:47,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:57:47,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13, 12] total 45 [2022-11-18 20:57:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92723552] [2022-11-18 20:57:47,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:57:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:57:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:57:47,974 INFO L87 Difference]: Start difference. First operand 553 states and 1019 transitions. Second operand has 45 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 39 states have internal predecessors, (157), 19 states have call successors, (55), 8 states have call predecessors, (55), 12 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-11-18 20:58:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:18,000 INFO L93 Difference]: Finished difference Result 2785 states and 6954 transitions. [2022-11-18 20:58:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-18 20:58:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 39 states have internal predecessors, (157), 19 states have call successors, (55), 8 states have call predecessors, (55), 12 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) Word has length 160 [2022-11-18 20:58:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:18,033 INFO L225 Difference]: With dead ends: 2785 [2022-11-18 20:58:18,033 INFO L226 Difference]: Without dead ends: 2246 [2022-11-18 20:58:18,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 361 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1418, Invalid=14584, Unknown=0, NotChecked=0, Total=16002 [2022-11-18 20:58:18,053 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1287 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 16682 mSolverCounterSat, 2422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 21750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2422 IncrementalHoareTripleChecker+Valid, 16682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2646 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:18,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 2788 Invalid, 21750 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2422 Valid, 16682 Invalid, 0 Unknown, 2646 Unchecked, 21.9s Time] [2022-11-18 20:58:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2022-11-18 20:58:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 853. [2022-11-18 20:58:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 485 states have (on average 1.1175257731958763) internal successors, (542), 498 states have internal predecessors, (542), 326 states have call successors, (326), 30 states have call predecessors, (326), 41 states have return successors, (878), 324 states have call predecessors, (878), 325 states have call successors, (878) [2022-11-18 20:58:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1746 transitions. [2022-11-18 20:58:18,538 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1746 transitions. Word has length 160 [2022-11-18 20:58:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:18,538 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1746 transitions. [2022-11-18 20:58:18,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 3.8292682926829267) internal successors, (157), 39 states have internal predecessors, (157), 19 states have call successors, (55), 8 states have call predecessors, (55), 12 states have return successors, (54), 18 states have call predecessors, (54), 19 states have call successors, (54) [2022-11-18 20:58:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1746 transitions. [2022-11-18 20:58:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:58:18,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:18,547 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 20:58:18,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:18,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:58:18,759 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2102429042, now seen corresponding path program 1 times [2022-11-18 20:58:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734519914] [2022-11-18 20:58:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:18,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:58:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:58:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:58:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:58:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:58:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:58:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:58:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:58:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:58:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:58:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 20:58:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-18 20:58:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:58:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:58:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 20:58:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:58:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 20:58:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-18 20:58:22,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734519914] [2022-11-18 20:58:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734519914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031002166] [2022-11-18 20:58:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:22,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:22,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:23,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:58:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:58:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:23,773 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 20:58:23,964 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 20:58:25,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-18 20:58:25,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:58:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:58:25,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031002166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:25,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:58:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [18] total 36 [2022-11-18 20:58:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201262749] [2022-11-18 20:58:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:58:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:58:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:58:25,465 INFO L87 Difference]: Start difference. First operand 853 states and 1746 transitions. Second operand has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 20:58:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:27,367 INFO L93 Difference]: Finished difference Result 1180 states and 2269 transitions. [2022-11-18 20:58:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:58:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 160 [2022-11-18 20:58:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:27,378 INFO L225 Difference]: With dead ends: 1180 [2022-11-18 20:58:27,379 INFO L226 Difference]: Without dead ends: 797 [2022-11-18 20:58:27,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:58:27,385 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 191 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:27,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 474 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1406 Invalid, 0 Unknown, 449 Unchecked, 1.3s Time] [2022-11-18 20:58:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-18 20:58:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 796. [2022-11-18 20:58:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 469 states have (on average 1.1215351812366738) internal successors, (526), 483 states have internal predecessors, (526), 283 states have call successors, (283), 31 states have call predecessors, (283), 43 states have return successors, (753), 281 states have call predecessors, (753), 282 states have call successors, (753) [2022-11-18 20:58:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1562 transitions. [2022-11-18 20:58:27,627 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1562 transitions. Word has length 160 [2022-11-18 20:58:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:27,627 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1562 transitions. [2022-11-18 20:58:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 20:58:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1562 transitions. [2022-11-18 20:58:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:58:27,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:27,635 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 20:58:27,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:58:27,846 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 628741198, now seen corresponding path program 2 times [2022-11-18 20:58:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815887208] [2022-11-18 20:58:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:31,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:58:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:31,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:58:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:58:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:58:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:58:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:58:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:58:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:58:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:58:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:58:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 20:58:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:58:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-18 20:58:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:58:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 20:58:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:58:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:58:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 20:58:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-18 20:58:33,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:33,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815887208] [2022-11-18 20:58:33,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815887208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157636930] [2022-11-18 20:58:33,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:33,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:33,444 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:33,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:58:35,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:58:35,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:58:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 120 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-18 20:58:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:47,585 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-18 20:58:47,816 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 20:58:47,816 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-11-18 20:58:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-18 20:58:47,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157636930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:47,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:47,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14, 11] total 46 [2022-11-18 20:58:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653778638] [2022-11-18 20:58:47,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:47,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:58:47,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:58:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1925, Unknown=1, NotChecked=0, Total=2070 [2022-11-18 20:58:47,894 INFO L87 Difference]: Start difference. First operand 796 states and 1562 transitions. Second operand has 46 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 16 states have call successors, (56), 6 states have call predecessors, (56), 10 states have return successors, (55), 14 states have call predecessors, (55), 15 states have call successors, (55) [2022-11-18 20:59:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:13,995 INFO L93 Difference]: Finished difference Result 1688 states and 3397 transitions. [2022-11-18 20:59:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-18 20:59:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 16 states have call successors, (56), 6 states have call predecessors, (56), 10 states have return successors, (55), 14 states have call predecessors, (55), 15 states have call successors, (55) Word has length 160 [2022-11-18 20:59:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:14,012 INFO L225 Difference]: With dead ends: 1688 [2022-11-18 20:59:14,012 INFO L226 Difference]: Without dead ends: 1272 [2022-11-18 20:59:14,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 350 SyntacticMatches, 11 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3021 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=970, Invalid=11225, Unknown=15, NotChecked=0, Total=12210 [2022-11-18 20:59:14,022 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1067 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 10304 mSolverCounterSat, 1511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 12999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1511 IncrementalHoareTripleChecker+Valid, 10304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1184 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:14,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 2182 Invalid, 12999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1511 Valid, 10304 Invalid, 0 Unknown, 1184 Unchecked, 12.9s Time] [2022-11-18 20:59:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-11-18 20:59:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 919. [2022-11-18 20:59:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 576 states have (on average 1.1423611111111112) internal successors, (658), 588 states have internal predecessors, (658), 289 states have call successors, (289), 43 states have call predecessors, (289), 53 states have return successors, (684), 287 states have call predecessors, (684), 288 states have call successors, (684) [2022-11-18 20:59:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1631 transitions. [2022-11-18 20:59:14,385 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1631 transitions. Word has length 160 [2022-11-18 20:59:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:14,385 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1631 transitions. [2022-11-18 20:59:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 4.0) internal successors, (164), 41 states have internal predecessors, (164), 16 states have call successors, (56), 6 states have call predecessors, (56), 10 states have return successors, (55), 14 states have call predecessors, (55), 15 states have call successors, (55) [2022-11-18 20:59:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1631 transitions. [2022-11-18 20:59:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 20:59:14,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:14,393 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 20:59:14,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:14,605 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash 541296782, now seen corresponding path program 1 times [2022-11-18 20:59:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158458628] [2022-11-18 20:59:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:59:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:59:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:59:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:59:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:59:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:59:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:59:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:59:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:59:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 20:59:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 20:59:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 20:59:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 20:59:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:18,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-18 20:59:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 20:59:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158458628] [2022-11-18 20:59:18,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158458628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795150860] [2022-11-18 20:59:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:18,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:18,030 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:18,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:59:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2870 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:59:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:19,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:19,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:19,302 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:59:19,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 20:59:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:59:20,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:20,975 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-18 20:59:21,098 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 20:59:21,098 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 24 [2022-11-18 20:59:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:59:21,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795150860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:21,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:21,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 36 [2022-11-18 20:59:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555138908] [2022-11-18 20:59:21,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:21,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:59:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:59:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:59:21,159 INFO L87 Difference]: Start difference. First operand 919 states and 1631 transitions. Second operand has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2022-11-18 20:59:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:29,685 INFO L93 Difference]: Finished difference Result 2045 states and 3941 transitions. [2022-11-18 20:59:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:59:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) Word has length 153 [2022-11-18 20:59:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:29,710 INFO L225 Difference]: With dead ends: 2045 [2022-11-18 20:59:29,711 INFO L226 Difference]: Without dead ends: 1742 [2022-11-18 20:59:29,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 335 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=666, Invalid=4446, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 20:59:29,718 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 438 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1045 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:29,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1723 Invalid, 5716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4404 Invalid, 0 Unknown, 1045 Unchecked, 5.7s Time] [2022-11-18 20:59:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-11-18 20:59:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1101. [2022-11-18 20:59:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 721 states have (on average 1.145631067961165) internal successors, (826), 735 states have internal predecessors, (826), 315 states have call successors, (315), 52 states have call predecessors, (315), 64 states have return successors, (756), 313 states have call predecessors, (756), 314 states have call successors, (756) [2022-11-18 20:59:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1897 transitions. [2022-11-18 20:59:30,034 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1897 transitions. Word has length 153 [2022-11-18 20:59:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:30,035 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1897 transitions. [2022-11-18 20:59:30,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2022-11-18 20:59:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1897 transitions. [2022-11-18 20:59:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:59:30,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:30,043 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-18 20:59:30,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:30,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-18 20:59:30,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1615258706, now seen corresponding path program 3 times [2022-11-18 20:59:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:30,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427670129] [2022-11-18 20:59:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:59:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:59:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:59:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:59:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:59:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:59:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:59:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:59:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:59:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 20:59:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:59:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-18 20:59:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:59:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 20:59:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 20:59:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-18 20:59:30,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427670129] [2022-11-18 20:59:30,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427670129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989824808] [2022-11-18 20:59:30,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:30,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:30,768 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:59:32,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:59:32,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:59:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:59:32,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:32,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989824808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:32,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:59:32,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2022-11-18 20:59:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664690358] [2022-11-18 20:59:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:32,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:59:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:32,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:59:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:59:32,466 INFO L87 Difference]: Start difference. First operand 1101 states and 1897 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-18 20:59:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:32,687 INFO L93 Difference]: Finished difference Result 1980 states and 3449 transitions. [2022-11-18 20:59:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:59:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 160 [2022-11-18 20:59:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:32,694 INFO L225 Difference]: With dead ends: 1980 [2022-11-18 20:59:32,695 INFO L226 Difference]: Without dead ends: 952 [2022-11-18 20:59:32,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:59:32,706 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 34 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 574 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 [2022-11-18 20:59:32,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 574 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:59:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-18 20:59:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 941. [2022-11-18 20:59:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 621 states have (on average 1.1304347826086956) internal successors, (702), 631 states have internal predecessors, (702), 263 states have call successors, (263), 48 states have call predecessors, (263), 56 states have return successors, (516), 261 states have call predecessors, (516), 262 states have call successors, (516) [2022-11-18 20:59:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1481 transitions. [2022-11-18 20:59:32,929 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1481 transitions. Word has length 160 [2022-11-18 20:59:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:32,929 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1481 transitions. [2022-11-18 20:59:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-18 20:59:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1481 transitions. [2022-11-18 20:59:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:59:32,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:32,936 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:32,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:33,149 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2005505805, now seen corresponding path program 1 times [2022-11-18 20:59:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873300899] [2022-11-18 20:59:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:59:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:59:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:59:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:59:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:59:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:59:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:59:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:37,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 20:59:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 20:59:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 20:59:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:59:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 20:59:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 20:59:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 20:59:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 47 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-18 20:59:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873300899] [2022-11-18 20:59:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873300899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445996558] [2022-11-18 20:59:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:38,786 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:38,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:59:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:39,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:59:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:39,567 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 20:59:39,675 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:59:40,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 20:59:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-18 20:59:41,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445996558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:42,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:42,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16] total 40 [2022-11-18 20:59:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176401953] [2022-11-18 20:59:42,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:59:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:59:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1998, Unknown=9, NotChecked=0, Total=2162 [2022-11-18 20:59:42,708 INFO L87 Difference]: Start difference. First operand 941 states and 1481 transitions. Second operand has 40 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (37), 7 states have call predecessors, (37), 10 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-11-18 20:59:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:49,719 INFO L93 Difference]: Finished difference Result 1329 states and 2040 transitions. [2022-11-18 20:59:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:59:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (37), 7 states have call predecessors, (37), 10 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) Word has length 160 [2022-11-18 20:59:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:49,731 INFO L225 Difference]: With dead ends: 1329 [2022-11-18 20:59:49,731 INFO L226 Difference]: Without dead ends: 1089 [2022-11-18 20:59:49,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 269 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=505, Invalid=5186, Unknown=9, NotChecked=0, Total=5700 [2022-11-18 20:59:49,735 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 259 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 5152 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 5152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 608 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:49,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2425 Invalid, 5886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 5152 Invalid, 0 Unknown, 608 Unchecked, 5.0s Time] [2022-11-18 20:59:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-11-18 20:59:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 967. [2022-11-18 20:59:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 640 states have (on average 1.128125) internal successors, (722), 650 states have internal predecessors, (722), 263 states have call successors, (263), 55 states have call predecessors, (263), 63 states have return successors, (510), 261 states have call predecessors, (510), 262 states have call successors, (510) [2022-11-18 20:59:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1495 transitions. [2022-11-18 20:59:50,051 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1495 transitions. Word has length 160 [2022-11-18 20:59:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:50,051 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1495 transitions. [2022-11-18 20:59:50,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 4.361111111111111) internal successors, (157), 35 states have internal predecessors, (157), 16 states have call successors, (37), 7 states have call predecessors, (37), 10 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2022-11-18 20:59:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1495 transitions. [2022-11-18 20:59:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-18 20:59:50,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:50,059 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-18 20:59:50,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:50,271 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash -679742379, now seen corresponding path program 1 times [2022-11-18 20:59:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847579940] [2022-11-18 20:59:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:59:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:59:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 20:59:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:59:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 20:59:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 20:59:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:54,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 20:59:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:59:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 20:59:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-18 20:59:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-18 20:59:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-18 20:59:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 20:59:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 20:59:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 20:59:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 20:59:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-18 20:59:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-18 20:59:55,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847579940] [2022-11-18 20:59:55,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847579940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911392035] [2022-11-18 20:59:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:55,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:55,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:59:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:56,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2909 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:59:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:56,299 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 21:00:00,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:00,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-18 21:00:01,021 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3612 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_3612))) is different from true [2022-11-18 21:00:01,023 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:00:01,031 WARN L859 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_3613 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_3613))) is different from true [2022-11-18 21:00:01,062 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-18 21:00:01,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2022-11-18 21:00:01,077 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 5 [2022-11-18 21:00:01,087 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 14 [2022-11-18 21:00:08,665 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 21:00:08,665 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-18 21:00:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 47 trivial. 2 not checked. [2022-11-18 21:00:08,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:10,278 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_save_byte_from_array_~storage#1.base_66| Int) (v_ArrVal_3617 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_66| v_ArrVal_3617))) (or (not (= (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset|) 18446744073709551616) 0)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|) 18446744073709551616) 0))))) is different from false [2022-11-18 21:00:10,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911392035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:10,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:10,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2022-11-18 21:00:10,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614914840] [2022-11-18 21:00:10,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 21:00:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 21:00:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2100, Unknown=4, NotChecked=282, Total=2550 [2022-11-18 21:00:10,283 INFO L87 Difference]: Start difference. First operand 967 states and 1495 transitions. Second operand has 41 states, 37 states have (on average 4.0) internal successors, (148), 35 states have internal predecessors, (148), 16 states have call successors, (41), 8 states have call predecessors, (41), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2022-11-18 21:00:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:28,530 INFO L93 Difference]: Finished difference Result 1413 states and 2100 transitions. [2022-11-18 21:00:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 21:00:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.0) internal successors, (148), 35 states have internal predecessors, (148), 16 states have call successors, (41), 8 states have call predecessors, (41), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) Word has length 155 [2022-11-18 21:00:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:28,539 INFO L225 Difference]: With dead ends: 1413 [2022-11-18 21:00:28,539 INFO L226 Difference]: Without dead ends: 1009 [2022-11-18 21:00:28,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 238 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=435, Invalid=4677, Unknown=12, NotChecked=426, Total=5550 [2022-11-18 21:00:28,543 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 397 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 4927 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 7738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 4927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2391 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:28,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1278 Invalid, 7738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 4927 Invalid, 0 Unknown, 2391 Unchecked, 5.9s Time] [2022-11-18 21:00:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-18 21:00:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 943. [2022-11-18 21:00:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 643 states have (on average 1.130637636080871) internal successors, (727), 653 states have internal predecessors, (727), 236 states have call successors, (236), 55 states have call predecessors, (236), 63 states have return successors, (459), 234 states have call predecessors, (459), 235 states have call successors, (459) [2022-11-18 21:00:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1422 transitions. [2022-11-18 21:00:28,772 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1422 transitions. Word has length 155 [2022-11-18 21:00:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:28,772 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1422 transitions. [2022-11-18 21:00:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.0) internal successors, (148), 35 states have internal predecessors, (148), 16 states have call successors, (41), 8 states have call predecessors, (41), 13 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2022-11-18 21:00:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1422 transitions. [2022-11-18 21:00:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 21:00:28,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:28,777 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 21:00:28,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:28,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 21:00:28,985 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:00:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:28,986 INFO L85 PathProgramCache]: Analyzing trace with hash 111218730, now seen corresponding path program 1 times [2022-11-18 21:00:28,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:28,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480998484] [2022-11-18 21:00:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:28,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:00:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:00:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:00:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:00:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:00:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:00:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:00:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:00:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:00:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:00:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:00:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:00:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 21:00:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:00:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:00:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:00:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:00:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:00:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 21:00:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 38 proven. 18 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-18 21:00:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480998484] [2022-11-18 21:00:30,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480998484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696287756] [2022-11-18 21:00:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:30,990 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:30,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 21:00:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 21:00:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:31,773 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 21:00:31,981 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:00:32,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-11-18 21:00:32,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 21:00:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:32,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 42 [2022-11-18 21:00:32,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-11-18 21:00:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 35 proven. 95 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 21:00:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:18,995 WARN L233 SmtUtils]: Spent 33.98s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:01:19,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:01:19,686 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12770 treesize of output 12202 [2022-11-18 21:01:22,300 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2022-11-18 21:01:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-18 21:01:22,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696287756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:22,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:01:22,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 22] total 56 [2022-11-18 21:01:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087773464] [2022-11-18 21:01:22,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:22,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 21:01:22,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 21:01:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2864, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 21:01:22,708 INFO L87 Difference]: Start difference. First operand 943 states and 1422 transitions. Second operand has 56 states, 53 states have (on average 3.943396226415094) internal successors, (209), 47 states have internal predecessors, (209), 18 states have call successors, (55), 12 states have call predecessors, (55), 16 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2022-11-18 21:01:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:37,356 INFO L93 Difference]: Finished difference Result 2091 states and 3555 transitions. [2022-11-18 21:01:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 21:01:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.943396226415094) internal successors, (209), 47 states have internal predecessors, (209), 18 states have call successors, (55), 12 states have call predecessors, (55), 16 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) Word has length 154 [2022-11-18 21:01:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:37,368 INFO L225 Difference]: With dead ends: 2091 [2022-11-18 21:01:37,369 INFO L226 Difference]: Without dead ends: 1750 [2022-11-18 21:01:37,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 313 SyntacticMatches, 15 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4091 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=859, Invalid=12479, Unknown=2, NotChecked=0, Total=13340 [2022-11-18 21:01:37,373 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 711 mSDsluCounter, 3738 mSDsCounter, 0 mSdLazyCounter, 7272 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 10383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 7272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2365 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:37,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 4028 Invalid, 10383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [746 Valid, 7272 Invalid, 0 Unknown, 2365 Unchecked, 9.0s Time] [2022-11-18 21:01:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-11-18 21:01:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1395. [2022-11-18 21:01:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 874 states have (on average 1.1178489702517163) internal successors, (977), 889 states have internal predecessors, (977), 430 states have call successors, (430), 78 states have call predecessors, (430), 90 states have return successors, (846), 427 states have call predecessors, (846), 428 states have call successors, (846) [2022-11-18 21:01:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2253 transitions. [2022-11-18 21:01:37,842 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2253 transitions. Word has length 154 [2022-11-18 21:01:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 2253 transitions. [2022-11-18 21:01:37,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.943396226415094) internal successors, (209), 47 states have internal predecessors, (209), 18 states have call successors, (55), 12 states have call predecessors, (55), 16 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2022-11-18 21:01:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2253 transitions. [2022-11-18 21:01:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 21:01:37,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:37,850 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-18 21:01:37,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:38,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 21:01:38,063 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 369384168, now seen corresponding path program 1 times [2022-11-18 21:01:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717271173] [2022-11-18 21:01:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:01:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:01:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:01:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:01:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:01:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:01:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:01:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:01:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:01:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 21:01:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:01:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:01:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:01:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 21:01:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-18 21:01:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717271173] [2022-11-18 21:01:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717271173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:38,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:38,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 21:01:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147692329] [2022-11-18 21:01:38,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:38,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:01:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:01:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:01:38,978 INFO L87 Difference]: Start difference. First operand 1395 states and 2253 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 21:01:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:40,001 INFO L93 Difference]: Finished difference Result 2189 states and 3605 transitions. [2022-11-18 21:01:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:40,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 154 [2022-11-18 21:01:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:40,010 INFO L225 Difference]: With dead ends: 2189 [2022-11-18 21:01:40,011 INFO L226 Difference]: Without dead ends: 1265 [2022-11-18 21:01:40,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:40,020 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:40,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 21:01:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-18 21:01:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1255. [2022-11-18 21:01:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 798 states have (on average 1.1065162907268171) internal successors, (883), 811 states have internal predecessors, (883), 368 states have call successors, (368), 78 states have call predecessors, (368), 88 states have return successors, (678), 365 states have call predecessors, (678), 366 states have call successors, (678) [2022-11-18 21:01:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1929 transitions. [2022-11-18 21:01:40,294 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1929 transitions. Word has length 154 [2022-11-18 21:01:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:40,295 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1929 transitions. [2022-11-18 21:01:40,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 21:01:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1929 transitions. [2022-11-18 21:01:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-18 21:01:40,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:40,301 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 21:01:40,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-18 21:01:40,301 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1335479474, now seen corresponding path program 1 times [2022-11-18 21:01:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:40,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219509446] [2022-11-18 21:01:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:01:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:01:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:01:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:01:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:01:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:01:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:01:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:01:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:01:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:01:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:01:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 21:01:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:01:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 21:01:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:01:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-18 21:01:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-18 21:01:45,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219509446] [2022-11-18 21:01:45,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219509446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68213144] [2022-11-18 21:01:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:45,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:45,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:45,695 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:45,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 21:01:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:46,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2960 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 21:01:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:46,497 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 21:01:47,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-18 21:01:47,119 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-18 21:01:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 141 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-18 21:01:47,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:47,545 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4097 (Array Int Int))) (<= 0 (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| v_ArrVal_4097) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|))) (+ .cse0 (* 18446744073709551616 (div (- .cse0) 18446744073709551616)))))) is different from false [2022-11-18 21:01:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68213144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:47,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:47,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12] total 34 [2022-11-18 21:01:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531183380] [2022-11-18 21:01:47,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:47,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 21:01:47,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 21:01:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1161, Unknown=1, NotChecked=68, Total=1332 [2022-11-18 21:01:47,555 INFO L87 Difference]: Start difference. First operand 1255 states and 1929 transitions. Second operand has 34 states, 29 states have (on average 4.758620689655173) internal successors, (138), 30 states have internal predecessors, (138), 16 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (41), 14 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-18 21:01:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:57,377 INFO L93 Difference]: Finished difference Result 2063 states and 3221 transitions. [2022-11-18 21:01:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 21:01:57,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 4.758620689655173) internal successors, (138), 30 states have internal predecessors, (138), 16 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (41), 14 states have call predecessors, (41), 16 states have call successors, (41) Word has length 167 [2022-11-18 21:01:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:57,384 INFO L225 Difference]: With dead ends: 2063 [2022-11-18 21:01:57,384 INFO L226 Difference]: Without dead ends: 1445 [2022-11-18 21:01:57,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=513, Invalid=3912, Unknown=1, NotChecked=130, Total=4556 [2022-11-18 21:01:57,387 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 722 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 6825 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 8292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 6825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:57,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 1815 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 6825 Invalid, 0 Unknown, 441 Unchecked, 7.4s Time] [2022-11-18 21:01:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-18 21:01:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1348. [2022-11-18 21:01:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 856 states have (on average 1.108644859813084) internal successors, (949), 871 states have internal predecessors, (949), 405 states have call successors, (405), 74 states have call predecessors, (405), 86 states have return successors, (754), 402 states have call predecessors, (754), 403 states have call successors, (754) [2022-11-18 21:01:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2108 transitions. [2022-11-18 21:01:57,773 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2108 transitions. Word has length 167 [2022-11-18 21:01:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:57,773 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 2108 transitions. [2022-11-18 21:01:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 4.758620689655173) internal successors, (138), 30 states have internal predecessors, (138), 16 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (41), 14 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-18 21:01:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2108 transitions. [2022-11-18 21:01:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 21:01:57,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:57,778 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:57,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:01:57,989 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash 259249071, now seen corresponding path program 1 times [2022-11-18 21:01:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:57,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119027420] [2022-11-18 21:01:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:57,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:01:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:01:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:01:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:01:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:01:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:01:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:01:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:01:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:01:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 21:01:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:01:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:01:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:01:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:01:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:01:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 21:01:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-18 21:01:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:58,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119027420] [2022-11-18 21:01:58,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119027420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:58,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:58,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 21:01:58,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161387564] [2022-11-18 21:01:58,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:58,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:01:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:01:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:01:58,765 INFO L87 Difference]: Start difference. First operand 1348 states and 2108 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 21:02:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:00,240 INFO L93 Difference]: Finished difference Result 1388 states and 2162 transitions. [2022-11-18 21:02:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:02:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 156 [2022-11-18 21:02:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:00,248 INFO L225 Difference]: With dead ends: 1388 [2022-11-18 21:02:00,248 INFO L226 Difference]: Without dead ends: 1386 [2022-11-18 21:02:00,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:02:00,249 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 119 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:00,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 759 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:02:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-11-18 21:02:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1361. [2022-11-18 21:02:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 859 states have (on average 1.108265424912689) internal successors, (952), 874 states have internal predecessors, (952), 414 states have call successors, (414), 75 states have call predecessors, (414), 87 states have return successors, (763), 411 states have call predecessors, (763), 412 states have call successors, (763) [2022-11-18 21:02:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2129 transitions. [2022-11-18 21:02:00,604 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2129 transitions. Word has length 156 [2022-11-18 21:02:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:00,604 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 2129 transitions. [2022-11-18 21:02:00,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2022-11-18 21:02:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2129 transitions. [2022-11-18 21:02:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 21:02:00,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:00,609 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-18 21:02:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-18 21:02:00,610 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1957535377, now seen corresponding path program 1 times [2022-11-18 21:02:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:00,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885495036] [2022-11-18 21:02:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:02:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:02:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:02:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:02:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:02:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:02:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:02:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:02,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:02:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:02:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-18 21:02:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:02:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-18 21:02:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 21:02:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 21:02:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-18 21:02:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:03,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885495036] [2022-11-18 21:02:03,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885495036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:03,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:03,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-11-18 21:02:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852955561] [2022-11-18 21:02:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:03,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:02:03,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:02:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:02:03,204 INFO L87 Difference]: Start difference. First operand 1361 states and 2129 transitions. Second operand has 22 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 10 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-18 21:02:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:06,487 INFO L93 Difference]: Finished difference Result 2015 states and 3270 transitions. [2022-11-18 21:02:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:02:06,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 10 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 162 [2022-11-18 21:02:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:06,499 INFO L225 Difference]: With dead ends: 2015 [2022-11-18 21:02:06,500 INFO L226 Difference]: Without dead ends: 1405 [2022-11-18 21:02:06,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:02:06,505 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 319 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:06,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 832 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 21:02:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-11-18 21:02:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1284. [2022-11-18 21:02:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 790 states have (on average 1.1050632911392404) internal successors, (873), 805 states have internal predecessors, (873), 410 states have call successors, (410), 71 states have call predecessors, (410), 83 states have return successors, (742), 407 states have call predecessors, (742), 408 states have call successors, (742) [2022-11-18 21:02:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 2025 transitions. [2022-11-18 21:02:06,857 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 2025 transitions. Word has length 162 [2022-11-18 21:02:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:06,857 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 2025 transitions. [2022-11-18 21:02:06,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 10 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-18 21:02:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 2025 transitions. [2022-11-18 21:02:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-18 21:02:06,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:06,863 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-18 21:02:06,864 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -658409527, now seen corresponding path program 1 times [2022-11-18 21:02:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:06,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363023821] [2022-11-18 21:02:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:02:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:02:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:02:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:02:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:02:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:02:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:02:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:02:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:02:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:02:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:02:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:02:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:02:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-18 21:02:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-18 21:02:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363023821] [2022-11-18 21:02:13,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363023821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:13,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:13,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-18 21:02:13,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576540372] [2022-11-18 21:02:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:02:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:02:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:02:13,337 INFO L87 Difference]: Start difference. First operand 1284 states and 2025 transitions. Second operand has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-18 21:02:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:16,510 INFO L93 Difference]: Finished difference Result 1449 states and 2256 transitions. [2022-11-18 21:02:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:02:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 173 [2022-11-18 21:02:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:16,522 INFO L225 Difference]: With dead ends: 1449 [2022-11-18 21:02:16,522 INFO L226 Difference]: Without dead ends: 1295 [2022-11-18 21:02:16,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:02:16,527 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 357 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:16,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 466 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 21:02:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-11-18 21:02:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1284. [2022-11-18 21:02:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 790 states have (on average 1.1050632911392404) internal successors, (873), 805 states have internal predecessors, (873), 410 states have call successors, (410), 71 states have call predecessors, (410), 83 states have return successors, (741), 407 states have call predecessors, (741), 408 states have call successors, (741) [2022-11-18 21:02:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 2024 transitions. [2022-11-18 21:02:16,906 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 2024 transitions. Word has length 173 [2022-11-18 21:02:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:16,906 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 2024 transitions. [2022-11-18 21:02:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-18 21:02:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 2024 transitions. [2022-11-18 21:02:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 21:02:16,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:16,912 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:16,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 21:02:16,913 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash -400443798, now seen corresponding path program 1 times [2022-11-18 21:02:16,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:16,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932996366] [2022-11-18 21:02:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:16,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:02:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:02:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:02:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:02:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:02:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:02:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:02:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:02:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:02:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:02:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:02:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:02:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:02:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:02:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:02:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:02:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-18 21:02:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-18 21:02:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:20,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932996366] [2022-11-18 21:02:20,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932996366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:20,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035565939] [2022-11-18 21:02:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:20,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:20,440 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:20,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 21:02:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-18 21:02:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:21,439 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:02:21,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-18 21:02:21,802 WARN L859 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1))) is different from true [2022-11-18 21:02:21,854 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 21:02:21,883 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-18 21:02:21,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-18 21:02:22,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 21:02:23,050 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-18 21:02:23,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 34 treesize of output 53 [2022-11-18 21:02:23,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-18 21:02:23,488 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:02:23,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 21:02:24,036 INFO L321 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2022-11-18 21:02:24,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 56 [2022-11-18 21:02:24,225 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:02:24,234 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4722 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_4722) |c_#memory_int|)) is different from true [2022-11-18 21:02:24,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 21:03:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 79 proven. 122 refuted. 0 times theorem prover too weak. 47 trivial. 2 not checked. [2022-11-18 21:03:13,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:14,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035565939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:14,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33] total 45 [2022-11-18 21:03:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321374401] [2022-11-18 21:03:14,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 21:03:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 21:03:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2118, Unknown=43, NotChecked=190, Total=2550 [2022-11-18 21:03:14,356 INFO L87 Difference]: Start difference. First operand 1284 states and 2024 transitions. Second operand has 45 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 37 states have internal predecessors, (174), 15 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) [2022-11-18 21:03:17,620 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4719 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_4719))) (exists ((v_ArrVal_4722 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_4722) |c_#memory_int|)) (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_110| Int) (|ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_buf_eq_harness_~#old_lhs~0#1.base| Int)) (and (= (select |c_#valid| |ULTIMATE.start_aws_byte_buf_eq_harness_~#old_lhs~0#1.base|) 1) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_110|) 1) (not (= |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_110|)) (not (= |ULTIMATE.start_aws_byte_buf_eq_harness_~#old_lhs~0#1.base| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|)) (= (select |c_#valid| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|) 1) (not (= |ULTIMATE.start_aws_byte_buf_eq_harness_~#old_lhs~0#1.base| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_110|))))) is different from true [2022-11-18 21:03:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:26,839 INFO L93 Difference]: Finished difference Result 1642 states and 2459 transitions. [2022-11-18 21:03:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 21:03:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 37 states have internal predecessors, (174), 15 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) Word has length 174 [2022-11-18 21:03:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:26,850 INFO L225 Difference]: With dead ends: 1642 [2022-11-18 21:03:26,850 INFO L226 Difference]: Without dead ends: 1459 [2022-11-18 21:03:26,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 256 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=413, Invalid=4932, Unknown=69, NotChecked=438, Total=5852 [2022-11-18 21:03:26,853 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 251 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 4381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2142 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:26,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2272 Invalid, 4381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2056 Invalid, 0 Unknown, 2142 Unchecked, 2.2s Time] [2022-11-18 21:03:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-18 21:03:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1375. [2022-11-18 21:03:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 862 states have (on average 1.0962877030162412) internal successors, (945), 878 states have internal predecessors, (945), 415 states have call successors, (415), 84 states have call predecessors, (415), 97 states have return successors, (745), 412 states have call predecessors, (745), 413 states have call successors, (745) [2022-11-18 21:03:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2105 transitions. [2022-11-18 21:03:27,355 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2105 transitions. Word has length 174 [2022-11-18 21:03:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:27,356 INFO L495 AbstractCegarLoop]: Abstraction has 1375 states and 2105 transitions. [2022-11-18 21:03:27,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 37 states have internal predecessors, (174), 15 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (41), 14 states have call predecessors, (41), 14 states have call successors, (41) [2022-11-18 21:03:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2105 transitions. [2022-11-18 21:03:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 21:03:27,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:27,363 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 21:03:27,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:27,563 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash 614907812, now seen corresponding path program 1 times [2022-11-18 21:03:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224491386] [2022-11-18 21:03:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:03:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:03:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:03:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:03:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:03:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:03:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:03:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:03:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 21:03:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:03:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:03:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:03:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:03:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 21:03:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-18 21:03:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:03:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-11-18 21:03:28,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224491386] [2022-11-18 21:03:28,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224491386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:28,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:28,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 21:03:28,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503835812] [2022-11-18 21:03:28,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:28,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:03:28,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:28,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:03:28,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:28,229 INFO L87 Difference]: Start difference. First operand 1375 states and 2105 transitions. Second operand has 11 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-18 21:03:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:29,533 INFO L93 Difference]: Finished difference Result 1401 states and 2138 transitions. [2022-11-18 21:03:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 21:03:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 174 [2022-11-18 21:03:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:29,541 INFO L225 Difference]: With dead ends: 1401 [2022-11-18 21:03:29,541 INFO L226 Difference]: Without dead ends: 1399 [2022-11-18 21:03:29,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:03:29,544 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 106 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:29,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 630 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:03:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-11-18 21:03:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1391. [2022-11-18 21:03:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 868 states have (on average 1.0956221198156681) internal successors, (951), 884 states have internal predecessors, (951), 423 states have call successors, (423), 86 states have call predecessors, (423), 99 states have return successors, (753), 420 states have call predecessors, (753), 421 states have call successors, (753) [2022-11-18 21:03:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2127 transitions. [2022-11-18 21:03:29,924 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2127 transitions. Word has length 174 [2022-11-18 21:03:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 2127 transitions. [2022-11-18 21:03:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-18 21:03:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2127 transitions. [2022-11-18 21:03:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 21:03:29,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:29,931 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2022-11-18 21:03:29,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-18 21:03:29,931 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:29,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2048010158, now seen corresponding path program 1 times [2022-11-18 21:03:29,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:29,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885504851] [2022-11-18 21:03:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:03:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:03:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:03:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:03:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:03:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:03:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:03:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:03:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:03:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:03:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:03:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:03:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:03:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:03:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:03:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:33,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:03:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:34,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:03:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:34,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:03:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-18 21:03:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-18 21:03:34,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:34,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885504851] [2022-11-18 21:03:34,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885504851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:03:34,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229046770] [2022-11-18 21:03:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:34,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:34,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 21:03:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-18 21:03:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:35,200 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:03:35,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-18 21:03:35,710 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 21:03:35,750 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-18 21:03:35,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-18 21:03:37,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-18 21:03:38,097 INFO L321 Elim1Store]: treesize reduction 174, result has 19.4 percent of original size [2022-11-18 21:03:38,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 39 treesize of output 66 [2022-11-18 21:03:38,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 21:03:38,888 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:03:45,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-18 21:03:45,571 INFO L321 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-11-18 21:03:45,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 43 [2022-11-18 21:03:45,834 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:03:45,844 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5062 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_5062) |c_#memory_int|)) is different from true [2022-11-18 21:03:45,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-18 21:04:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 129 refuted. 0 times theorem prover too weak. 47 trivial. 2 not checked. [2022-11-18 21:04:48,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:49,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229046770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:49,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:49,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 37] total 52 [2022-11-18 21:04:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260077722] [2022-11-18 21:04:49,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 21:04:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 21:04:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2971, Unknown=80, NotChecked=112, Total=3422 [2022-11-18 21:04:49,380 INFO L87 Difference]: Start difference. First operand 1391 states and 2127 transitions. Second operand has 52 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 42 states have internal predecessors, (176), 17 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (41), 15 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-18 21:04:52,247 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5058 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_5058) |c_#memory_int|)) (exists ((v_ArrVal_5062 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_5062) |c_#memory_int|)) (exists ((|bounded_malloc_#res.base| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base_BEFORE_CALL_91| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_118| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_115| Int)) (and (not (= |bounded_malloc_#res.base| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4|)) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4|) 1) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base_BEFORE_CALL_91|)) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_115| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base_BEFORE_CALL_91|)) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_115|)) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#old_byte_from_lhs~0#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_118|)) (not (= |bounded_malloc_#res.base| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_115|)) (not (= |bounded_malloc_#res.base| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base_BEFORE_CALL_91|)) (= 1 (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base_BEFORE_CALL_91|)) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_118|) 1) (= (select |c_#valid| |bounded_malloc_#res.base|) 1) (= (select |c_#valid| |v_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base_BEFORE_CALL_115|) 1)))) is different from true [2022-11-18 21:05:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:02,509 INFO L93 Difference]: Finished difference Result 1616 states and 2415 transitions. [2022-11-18 21:05:02,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 21:05:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 42 states have internal predecessors, (176), 17 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (41), 15 states have call predecessors, (41), 16 states have call successors, (41) Word has length 174 [2022-11-18 21:05:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:02,516 INFO L225 Difference]: With dead ends: 1616 [2022-11-18 21:05:02,516 INFO L226 Difference]: Without dead ends: 1465 [2022-11-18 21:05:02,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 258 SyntacticMatches, 18 SemanticMatches, 84 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 82.3s TimeCoverageRelationStatistics Valid=555, Invalid=6311, Unknown=114, NotChecked=330, Total=7310 [2022-11-18 21:05:02,519 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 261 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 3964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2271 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:02,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2100 Invalid, 3964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1523 Invalid, 0 Unknown, 2271 Unchecked, 1.8s Time] [2022-11-18 21:05:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-11-18 21:05:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1404. [2022-11-18 21:05:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 876 states have (on average 1.095890410958904) internal successors, (960), 893 states have internal predecessors, (960), 425 states have call successors, (425), 88 states have call predecessors, (425), 102 states have return successors, (754), 422 states have call predecessors, (754), 423 states have call successors, (754) [2022-11-18 21:05:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2139 transitions. [2022-11-18 21:05:02,869 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2139 transitions. Word has length 174 [2022-11-18 21:05:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:02,870 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 2139 transitions. [2022-11-18 21:05:02,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 42 states have internal predecessors, (176), 17 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (41), 15 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-18 21:05:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2139 transitions. [2022-11-18 21:05:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-18 21:05:02,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:02,875 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:02,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:03,087 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1798930507, now seen corresponding path program 1 times [2022-11-18 21:05:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050440457] [2022-11-18 21:05:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:08,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:05:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:08,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:05:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:05:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:05:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:05:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:05:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:05:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:05:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:05:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:05:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:05:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:05:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:05:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:05:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:05:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-18 21:05:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-18 21:05:10,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:10,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050440457] [2022-11-18 21:05:10,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050440457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:10,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:10,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 21:05:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209565905] [2022-11-18 21:05:10,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:10,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:05:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:05:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:05:10,233 INFO L87 Difference]: Start difference. First operand 1404 states and 2139 transitions. Second operand has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 21 states have internal predecessors, (70), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-18 21:05:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:15,236 INFO L93 Difference]: Finished difference Result 1421 states and 2163 transitions. [2022-11-18 21:05:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 21:05:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 21 states have internal predecessors, (70), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) Word has length 176 [2022-11-18 21:05:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:15,244 INFO L225 Difference]: With dead ends: 1421 [2022-11-18 21:05:15,244 INFO L226 Difference]: Without dead ends: 1419 [2022-11-18 21:05:15,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:05:15,246 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 431 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 3631 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 3631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:15,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 699 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 3631 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-18 21:05:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-11-18 21:05:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1402. [2022-11-18 21:05:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 879 states have (on average 1.0955631399317407) internal successors, (963), 896 states have internal predecessors, (963), 419 states have call successors, (419), 89 states have call predecessors, (419), 103 states have return successors, (748), 416 states have call predecessors, (748), 417 states have call successors, (748) [2022-11-18 21:05:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2130 transitions. [2022-11-18 21:05:15,726 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2130 transitions. Word has length 176 [2022-11-18 21:05:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:15,727 INFO L495 AbstractCegarLoop]: Abstraction has 1402 states and 2130 transitions. [2022-11-18 21:05:15,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 21 states have internal predecessors, (70), 10 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-18 21:05:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2130 transitions. [2022-11-18 21:05:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-18 21:05:15,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:15,730 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 21:05:15,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-18 21:05:15,730 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 278988202, now seen corresponding path program 1 times [2022-11-18 21:05:15,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800736898] [2022-11-18 21:05:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:15,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:05:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:05:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:05:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:05:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:05:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:05:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:05:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:05:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:05:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-18 21:05:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:05:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:05:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:05:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-18 21:05:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-18 21:05:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:05:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-18 21:05:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800736898] [2022-11-18 21:05:18,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800736898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583019647] [2022-11-18 21:05:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:18,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:18,687 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:18,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 21:05:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:19,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 2921 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 21:05:19,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:19,648 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 21:05:19,673 INFO L350 Elim1Store]: Elim1 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 23 [2022-11-18 21:05:19,675 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:05:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-18 21:05:21,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 66 proven. 30 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 21:05:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583019647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:21,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:21,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 9] total 39 [2022-11-18 21:05:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513702391] [2022-11-18 21:05:21,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 21:05:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 21:05:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 21:05:21,814 INFO L87 Difference]: Start difference. First operand 1402 states and 2130 transitions. Second operand has 39 states, 36 states have (on average 5.083333333333333) internal successors, (183), 34 states have internal predecessors, (183), 15 states have call successors, (59), 7 states have call predecessors, (59), 10 states have return successors, (58), 14 states have call predecessors, (58), 15 states have call successors, (58) [2022-11-18 21:05:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:30,415 INFO L93 Difference]: Finished difference Result 2395 states and 3569 transitions. [2022-11-18 21:05:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 21:05:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 5.083333333333333) internal successors, (183), 34 states have internal predecessors, (183), 15 states have call successors, (59), 7 states have call predecessors, (59), 10 states have return successors, (58), 14 states have call predecessors, (58), 15 states have call successors, (58) Word has length 178 [2022-11-18 21:05:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:30,426 INFO L225 Difference]: With dead ends: 2395 [2022-11-18 21:05:30,427 INFO L226 Difference]: Without dead ends: 1902 [2022-11-18 21:05:30,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 378 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=675, Invalid=5487, Unknown=0, NotChecked=0, Total=6162 [2022-11-18 21:05:30,431 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 402 mSDsluCounter, 2956 mSDsCounter, 0 mSdLazyCounter, 5104 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 6151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:30,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 3145 Invalid, 6151 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [265 Valid, 5104 Invalid, 0 Unknown, 782 Unchecked, 5.2s Time] [2022-11-18 21:05:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-11-18 21:05:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1606. [2022-11-18 21:05:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1045 states have (on average 1.1023923444976076) internal successors, (1152), 1066 states have internal predecessors, (1152), 425 states have call successors, (425), 117 states have call predecessors, (425), 135 states have return successors, (724), 422 states have call predecessors, (724), 423 states have call successors, (724) [2022-11-18 21:05:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2301 transitions. [2022-11-18 21:05:30,981 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2301 transitions. Word has length 178 [2022-11-18 21:05:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:30,981 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2301 transitions. [2022-11-18 21:05:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 5.083333333333333) internal successors, (183), 34 states have internal predecessors, (183), 15 states have call successors, (59), 7 states have call predecessors, (59), 10 states have return successors, (58), 14 states have call predecessors, (58), 15 states have call successors, (58) [2022-11-18 21:05:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2301 transitions. [2022-11-18 21:05:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-18 21:05:30,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:30,987 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2022-11-18 21:05:31,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:31,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:31,198 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash 273018111, now seen corresponding path program 1 times [2022-11-18 21:05:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000408136] [2022-11-18 21:05:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:05:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:05:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:05:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:05:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:05:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:05:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:05:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:05:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:05:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:05:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 21:05:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:05:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 21:05:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:05:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:05:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 21:05:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:05:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 21:05:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 44 proven. 55 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-18 21:05:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000408136] [2022-11-18 21:05:34,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000408136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:34,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072677962] [2022-11-18 21:05:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:34,375 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:34,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 21:05:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2927 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 21:05:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:35,484 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:05:36,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-11-18 21:05:36,109 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 14 [2022-11-18 21:05:36,119 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:05:36,265 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 8 [2022-11-18 21:05:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 55 proven. 118 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 21:05:38,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:51,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:05:51,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2022-11-18 21:05:52,098 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2022-11-18 21:05:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 58 proven. 4 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-11-18 21:05:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072677962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:52,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:52,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 21] total 57 [2022-11-18 21:05:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231514777] [2022-11-18 21:05:52,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:52,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 21:05:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 21:05:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2971, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 21:05:52,417 INFO L87 Difference]: Start difference. First operand 1606 states and 2301 transitions. Second operand has 57 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 49 states have internal predecessors, (213), 19 states have call successors, (61), 12 states have call predecessors, (61), 17 states have return successors, (60), 21 states have call predecessors, (60), 18 states have call successors, (60) [2022-11-18 21:06:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:04,758 INFO L93 Difference]: Finished difference Result 2510 states and 3662 transitions. [2022-11-18 21:06:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-18 21:06:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 49 states have internal predecessors, (213), 19 states have call successors, (61), 12 states have call predecessors, (61), 17 states have return successors, (60), 21 states have call predecessors, (60), 18 states have call successors, (60) Word has length 184 [2022-11-18 21:06:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:04,768 INFO L225 Difference]: With dead ends: 2510 [2022-11-18 21:06:04,769 INFO L226 Difference]: Without dead ends: 2138 [2022-11-18 21:06:04,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 374 SyntacticMatches, 21 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3717 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=867, Invalid=10905, Unknown=0, NotChecked=0, Total=11772 [2022-11-18 21:06:04,772 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 520 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 5406 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 8085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 5406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2265 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:04,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 2619 Invalid, 8085 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 5406 Invalid, 0 Unknown, 2265 Unchecked, 6.8s Time] [2022-11-18 21:06:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-11-18 21:06:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1891. [2022-11-18 21:06:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1229 states have (on average 1.096013018714402) internal successors, (1347), 1253 states have internal predecessors, (1347), 499 states have call successors, (499), 141 states have call predecessors, (499), 162 states have return successors, (843), 496 states have call predecessors, (843), 497 states have call successors, (843) [2022-11-18 21:06:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2689 transitions. [2022-11-18 21:06:05,256 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2689 transitions. Word has length 184 [2022-11-18 21:06:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:05,257 INFO L495 AbstractCegarLoop]: Abstraction has 1891 states and 2689 transitions. [2022-11-18 21:06:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 49 states have internal predecessors, (213), 19 states have call successors, (61), 12 states have call predecessors, (61), 17 states have return successors, (60), 21 states have call predecessors, (60), 18 states have call successors, (60) [2022-11-18 21:06:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2689 transitions. [2022-11-18 21:06:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-18 21:06:05,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:05,264 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-18 21:06:05,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-18 21:06:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 21:06:05,475 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1763880772, now seen corresponding path program 1 times [2022-11-18 21:06:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:05,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144869665] [2022-11-18 21:06:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:06:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:06:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:06:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:06:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:06:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:06:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:06:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:06:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:06:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 21:06:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:06:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 21:06:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 21:06:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:06:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 21:06:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-11-18 21:06:06,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144869665] [2022-11-18 21:06:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144869665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:06,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:06,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-18 21:06:06,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522306759] [2022-11-18 21:06:06,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:06,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:06:06,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:06:06,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:06:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:06:06,726 INFO L87 Difference]: Start difference. First operand 1891 states and 2689 transitions. Second operand has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-18 21:06:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:08,294 INFO L93 Difference]: Finished difference Result 1911 states and 2713 transitions. [2022-11-18 21:06:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:06:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 186 [2022-11-18 21:06:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:08,306 INFO L225 Difference]: With dead ends: 1911 [2022-11-18 21:06:08,306 INFO L226 Difference]: Without dead ends: 1909 [2022-11-18 21:06:08,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:06:08,309 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 121 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:08,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 759 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:06:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-18 21:06:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1886. [2022-11-18 21:06:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1229 states have (on average 1.096013018714402) internal successors, (1347), 1253 states have internal predecessors, (1347), 494 states have call successors, (494), 141 states have call predecessors, (494), 162 states have return successors, (838), 491 states have call predecessors, (838), 492 states have call successors, (838) [2022-11-18 21:06:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2679 transitions. [2022-11-18 21:06:08,883 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2679 transitions. Word has length 186 [2022-11-18 21:06:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:08,884 INFO L495 AbstractCegarLoop]: Abstraction has 1886 states and 2679 transitions. [2022-11-18 21:06:08,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-18 21:06:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2679 transitions. [2022-11-18 21:06:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-18 21:06:08,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:08,890 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:08,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-18 21:06:08,891 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash -500859700, now seen corresponding path program 1 times [2022-11-18 21:06:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863072741] [2022-11-18 21:06:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:06:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:06:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:06:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:06:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:06:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:06:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:06:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:06:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:06:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 21:06:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:06:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 21:06:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 21:06:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:06:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 21:06:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-18 21:06:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-11-18 21:06:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863072741] [2022-11-18 21:06:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863072741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:11,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:11,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 21:06:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798897590] [2022-11-18 21:06:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:06:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:06:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:06:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:06:11,979 INFO L87 Difference]: Start difference. First operand 1886 states and 2679 transitions. Second operand has 12 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 21:06:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:14,084 INFO L93 Difference]: Finished difference Result 1899 states and 2698 transitions. [2022-11-18 21:06:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 21:06:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 188 [2022-11-18 21:06:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:14,093 INFO L225 Difference]: With dead ends: 1899 [2022-11-18 21:06:14,093 INFO L226 Difference]: Without dead ends: 1897 [2022-11-18 21:06:14,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:06:14,095 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 289 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:14,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 409 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 21:06:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-11-18 21:06:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1890. [2022-11-18 21:06:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1232 states have (on average 1.0957792207792207) internal successors, (1350), 1256 states have internal predecessors, (1350), 494 states have call successors, (494), 142 states have call predecessors, (494), 163 states have return successors, (838), 491 states have call predecessors, (838), 492 states have call successors, (838) [2022-11-18 21:06:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2682 transitions. [2022-11-18 21:06:14,699 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2682 transitions. Word has length 188 [2022-11-18 21:06:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 2682 transitions. [2022-11-18 21:06:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.2) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 21:06:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2682 transitions. [2022-11-18 21:06:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-18 21:06:14,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:14,706 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:14,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-18 21:06:14,706 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash 729972362, now seen corresponding path program 1 times [2022-11-18 21:06:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:14,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869346875] [2022-11-18 21:06:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:06:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:06:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:06:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:06:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:06:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:06:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 21:06:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 21:06:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:06:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-18 21:06:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-18 21:06:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-18 21:06:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-18 21:06:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 21:06:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-18 21:06:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 21:06:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-18 21:06:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-11-18 21:06:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-18 21:06:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869346875] [2022-11-18 21:06:15,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869346875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:06:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582370809] [2022-11-18 21:06:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:15,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:15,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:06:15,628 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:06:15,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 21:06:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 2995 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 21:06:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:16,870 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:06:18,210 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 21:06:18,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:06:18,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-11-18 21:06:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 224 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 21:06:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:19,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:06:19,188 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 35 [2022-11-18 21:06:19,743 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-18 21:06:19,744 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 34 [2022-11-18 21:06:19,957 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2022-11-18 21:06:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-18 21:06:20,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582370809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:20,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:06:20,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 19] total 48 [2022-11-18 21:06:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990980937] [2022-11-18 21:06:20,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 21:06:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:06:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 21:06:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:06:20,216 INFO L87 Difference]: Start difference. First operand 1890 states and 2682 transitions. Second operand has 48 states, 43 states have (on average 4.674418604651163) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (67), 10 states have call predecessors, (67), 15 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) [2022-11-18 21:06:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:29,289 INFO L93 Difference]: Finished difference Result 3383 states and 4872 transitions. [2022-11-18 21:06:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 21:06:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 4.674418604651163) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (67), 10 states have call predecessors, (67), 15 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) Word has length 206 [2022-11-18 21:06:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:29,299 INFO L225 Difference]: With dead ends: 3383 [2022-11-18 21:06:29,300 INFO L226 Difference]: Without dead ends: 1854 [2022-11-18 21:06:29,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 432 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=743, Invalid=6567, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 21:06:29,313 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 441 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 4841 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 5933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 4841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:29,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1520 Invalid, 5933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 4841 Invalid, 0 Unknown, 832 Unchecked, 5.0s Time] [2022-11-18 21:06:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-11-18 21:06:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1792. [2022-11-18 21:06:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1182 states have (on average 1.098984771573604) internal successors, (1299), 1205 states have internal predecessors, (1299), 450 states have call successors, (450), 139 states have call predecessors, (450), 159 states have return successors, (752), 447 states have call predecessors, (752), 448 states have call successors, (752) [2022-11-18 21:06:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2501 transitions. [2022-11-18 21:06:29,885 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2501 transitions. Word has length 206 [2022-11-18 21:06:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:29,885 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2501 transitions. [2022-11-18 21:06:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 4.674418604651163) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (67), 10 states have call predecessors, (67), 15 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) [2022-11-18 21:06:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2501 transitions. [2022-11-18 21:06:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-18 21:06:29,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:29,889 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2022-11-18 21:06:29,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:30,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 21:06:30,089 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1725065373, now seen corresponding path program 2 times [2022-11-18 21:06:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:30,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990910225] [2022-11-18 21:06:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:30,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:06:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:06:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:06:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:06:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:06:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:06:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 21:06:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 21:06:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:06:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:33,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:06:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 21:06:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 21:06:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-18 21:06:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 21:06:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-18 21:06:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-11-18 21:06:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-18 21:06:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-11-18 21:06:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 61 proven. 3 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-18 21:06:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990910225] [2022-11-18 21:06:35,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990910225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:06:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488686607] [2022-11-18 21:06:35,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:06:35,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:06:35,035 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:06:35,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 21:06:37,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:06:37,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:37,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 21:06:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:37,399 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:06:38,494 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 21:06:38,494 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-11-18 21:06:38,497 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 21:06:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 228 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 21:06:38,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:39,622 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 27 [2022-11-18 21:06:40,003 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 21:06:40,004 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-18 21:06:40,292 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 26 [2022-11-18 21:06:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-18 21:06:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488686607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:40,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:06:40,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 17] total 57 [2022-11-18 21:06:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103376102] [2022-11-18 21:06:40,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 21:06:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:06:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 21:06:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 21:06:40,579 INFO L87 Difference]: Start difference. First operand 1792 states and 2501 transitions. Second operand has 57 states, 51 states have (on average 4.470588235294118) internal successors, (228), 47 states have internal predecessors, (228), 21 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (75), 21 states have call predecessors, (75), 21 states have call successors, (75) [2022-11-18 21:06:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:52,650 INFO L93 Difference]: Finished difference Result 2775 states and 3759 transitions. [2022-11-18 21:06:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-18 21:06:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 51 states have (on average 4.470588235294118) internal successors, (228), 47 states have internal predecessors, (228), 21 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (75), 21 states have call predecessors, (75), 21 states have call successors, (75) Word has length 208 [2022-11-18 21:06:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:52,658 INFO L225 Difference]: With dead ends: 2775 [2022-11-18 21:06:52,658 INFO L226 Difference]: Without dead ends: 2045 [2022-11-18 21:06:52,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=908, Invalid=10864, Unknown=0, NotChecked=0, Total=11772 [2022-11-18 21:06:52,662 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 616 mSDsluCounter, 4064 mSDsCounter, 0 mSdLazyCounter, 6647 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 4287 SdHoareTripleChecker+Invalid, 8381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 6647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1239 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:52,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 4287 Invalid, 8381 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [495 Valid, 6647 Invalid, 0 Unknown, 1239 Unchecked, 7.6s Time] [2022-11-18 21:06:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-11-18 21:06:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1776. [2022-11-18 21:06:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1235 states have (on average 1.0987854251012146) internal successors, (1357), 1264 states have internal predecessors, (1357), 370 states have call successors, (370), 144 states have call predecessors, (370), 170 states have return successors, (626), 367 states have call predecessors, (626), 368 states have call successors, (626) [2022-11-18 21:06:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 2353 transitions. [2022-11-18 21:06:52,973 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 2353 transitions. Word has length 208 [2022-11-18 21:06:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:52,973 INFO L495 AbstractCegarLoop]: Abstraction has 1776 states and 2353 transitions. [2022-11-18 21:06:52,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 51 states have (on average 4.470588235294118) internal successors, (228), 47 states have internal predecessors, (228), 21 states have call successors, (77), 10 states have call predecessors, (77), 19 states have return successors, (75), 21 states have call predecessors, (75), 21 states have call successors, (75) [2022-11-18 21:06:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 2353 transitions. [2022-11-18 21:06:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-18 21:06:52,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:52,977 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:52,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-18 21:06:53,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 21:06:53,177 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:53,178 INFO L85 PathProgramCache]: Analyzing trace with hash 106192136, now seen corresponding path program 1 times [2022-11-18 21:06:53,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:53,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937239013] [2022-11-18 21:06:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:53,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:56,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:06:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:56,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:06:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:06:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:06:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:06:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:06:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 21:06:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 21:06:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:06:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:06:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 21:06:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 21:06:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:06:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-18 21:06:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:06:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-18 21:06:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-18 21:06:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-18 21:06:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-18 21:06:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:06:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:06:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-11-18 21:06:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-18 21:06:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937239013] [2022-11-18 21:06:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937239013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:06:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604346691] [2022-11-18 21:06:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:58,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:06:58,937 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:06:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 21:06:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 21:06:59,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:59,889 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-18 21:07:01,131 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:07:01,142 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6165 (Array Int Int))) (= (store |c_old(#memory_int)| |c_ensure_byte_buf_has_allocated_buffer_member_#in~buf.base| v_ArrVal_6165) |c_#memory_int|)) is different from true [2022-11-18 21:07:01,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-18 21:07:01,632 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-18 21:07:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 235 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-18 21:07:01,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:02,117 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6169 (Array Int Int))) (<= 0 (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| v_ArrVal_6169) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|))) (+ (* 18446744073709551616 (div (- .cse0) 18446744073709551616)) .cse0)))) is different from false [2022-11-18 21:07:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604346691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:02,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:02,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16] total 39 [2022-11-18 21:07:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938819821] [2022-11-18 21:07:02,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 21:07:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 21:07:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1446, Unknown=3, NotChecked=154, Total=1722 [2022-11-18 21:07:02,121 INFO L87 Difference]: Start difference. First operand 1776 states and 2353 transitions. Second operand has 39 states, 34 states have (on average 4.882352941176471) internal successors, (166), 34 states have internal predecessors, (166), 20 states have call successors, (53), 7 states have call predecessors, (53), 11 states have return successors, (52), 18 states have call predecessors, (52), 20 states have call successors, (52) [2022-11-18 21:07:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:21,551 INFO L93 Difference]: Finished difference Result 3327 states and 4868 transitions. [2022-11-18 21:07:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 21:07:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 4.882352941176471) internal successors, (166), 34 states have internal predecessors, (166), 20 states have call successors, (53), 7 states have call predecessors, (53), 11 states have return successors, (52), 18 states have call predecessors, (52), 20 states have call successors, (52) Word has length 209 [2022-11-18 21:07:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:21,563 INFO L225 Difference]: With dead ends: 3327 [2022-11-18 21:07:21,563 INFO L226 Difference]: Without dead ends: 2482 [2022-11-18 21:07:21,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 361 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=900, Invalid=8781, Unknown=29, NotChecked=390, Total=10100 [2022-11-18 21:07:21,569 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 931 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 11389 mSolverCounterSat, 1743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 14757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1743 IncrementalHoareTripleChecker+Valid, 11389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1625 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:21,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1929 Invalid, 14757 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1743 Valid, 11389 Invalid, 0 Unknown, 1625 Unchecked, 14.3s Time] [2022-11-18 21:07:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2022-11-18 21:07:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1980. [2022-11-18 21:07:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1330 states have (on average 1.0992481203007518) internal successors, (1462), 1355 states have internal predecessors, (1462), 480 states have call successors, (480), 147 states have call predecessors, (480), 169 states have return successors, (817), 477 states have call predecessors, (817), 478 states have call successors, (817) [2022-11-18 21:07:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2759 transitions. [2022-11-18 21:07:22,222 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2759 transitions. Word has length 209 [2022-11-18 21:07:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:22,222 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2759 transitions. [2022-11-18 21:07:22,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 4.882352941176471) internal successors, (166), 34 states have internal predecessors, (166), 20 states have call successors, (53), 7 states have call predecessors, (53), 11 states have return successors, (52), 18 states have call predecessors, (52), 20 states have call successors, (52) [2022-11-18 21:07:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2759 transitions. [2022-11-18 21:07:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-18 21:07:22,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:22,228 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-18 21:07:22,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-18 21:07:22,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 21:07:22,438 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash 481899292, now seen corresponding path program 1 times [2022-11-18 21:07:22,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749856098] [2022-11-18 21:07:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:07:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:07:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:07:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:07:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:07:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:07:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 21:07:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 21:07:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:07:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-18 21:07:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-18 21:07:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 21:07:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 21:07:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-18 21:07:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-18 21:07:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-11-18 21:07:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-11-18 21:07:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-11-18 21:07:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-18 21:07:24,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749856098] [2022-11-18 21:07:24,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749856098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474236327] [2022-11-18 21:07:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:24,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:24,228 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:24,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 21:07:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:25,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 21:07:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:25,273 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-18 21:07:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 21:07:25,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:07:25,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474236327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:25,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:07:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 23 [2022-11-18 21:07:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746070430] [2022-11-18 21:07:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:07:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:07:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:07:25,653 INFO L87 Difference]: Start difference. First operand 1980 states and 2759 transitions. Second operand has 13 states, 12 states have (on average 7.916666666666667) internal successors, (95), 10 states have internal predecessors, (95), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-18 21:07:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:26,520 INFO L93 Difference]: Finished difference Result 2989 states and 3947 transitions. [2022-11-18 21:07:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:07:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.916666666666667) internal successors, (95), 10 states have internal predecessors, (95), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 203 [2022-11-18 21:07:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:26,527 INFO L225 Difference]: With dead ends: 2989 [2022-11-18 21:07:26,528 INFO L226 Difference]: Without dead ends: 1923 [2022-11-18 21:07:26,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:07:26,531 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 55 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:26,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 2036 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2022-11-18 21:07:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-11-18 21:07:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1913. [2022-11-18 21:07:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1297 states have (on average 1.0963762528912875) internal successors, (1422), 1323 states have internal predecessors, (1422), 446 states have call successors, (446), 146 states have call predecessors, (446), 169 states have return successors, (763), 443 states have call predecessors, (763), 444 states have call successors, (763) [2022-11-18 21:07:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2631 transitions. [2022-11-18 21:07:27,010 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2631 transitions. Word has length 203 [2022-11-18 21:07:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:27,011 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 2631 transitions. [2022-11-18 21:07:27,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.916666666666667) internal successors, (95), 10 states have internal predecessors, (95), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-18 21:07:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2631 transitions. [2022-11-18 21:07:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-18 21:07:27,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:27,016 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:27,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-18 21:07:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-18 21:07:27,217 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1255357030, now seen corresponding path program 1 times [2022-11-18 21:07:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959531615] [2022-11-18 21:07:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:07:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:07:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:07:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:07:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:07:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:07:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-18 21:07:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-18 21:07:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:07:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 21:07:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-18 21:07:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-18 21:07:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-11-18 21:07:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-11-18 21:07:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-18 21:07:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-11-18 21:07:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-11-18 21:07:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-18 21:07:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959531615] [2022-11-18 21:07:30,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959531615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:30,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:30,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 21:07:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484249882] [2022-11-18 21:07:30,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:30,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:30,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:30,731 INFO L87 Difference]: Start difference. First operand 1913 states and 2631 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-18 21:07:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:33,572 INFO L93 Difference]: Finished difference Result 1974 states and 2789 transitions. [2022-11-18 21:07:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:07:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 195 [2022-11-18 21:07:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:33,582 INFO L225 Difference]: With dead ends: 1974 [2022-11-18 21:07:33,583 INFO L226 Difference]: Without dead ends: 1972 [2022-11-18 21:07:33,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:07:33,586 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 249 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:33,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 369 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 21:07:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2022-11-18 21:07:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1917. [2022-11-18 21:07:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1300 states have (on average 1.0961538461538463) internal successors, (1425), 1326 states have internal predecessors, (1425), 446 states have call successors, (446), 147 states have call predecessors, (446), 170 states have return successors, (763), 443 states have call predecessors, (763), 444 states have call successors, (763) [2022-11-18 21:07:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2634 transitions. [2022-11-18 21:07:34,176 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2634 transitions. Word has length 195 [2022-11-18 21:07:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:34,176 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 2634 transitions. [2022-11-18 21:07:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-18 21:07:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2634 transitions. [2022-11-18 21:07:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-18 21:07:34,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:34,183 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-18 21:07:34,184 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -607598529, now seen corresponding path program 2 times [2022-11-18 21:07:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:34,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325339775] [2022-11-18 21:07:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:07:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:07:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:07:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:07:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:07:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-18 21:07:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-18 21:07:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-18 21:07:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-18 21:07:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-18 21:07:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-18 21:07:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-18 21:07:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:07:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:07:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-18 21:07:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-11-18 21:07:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-11-18 21:07:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-11-18 21:07:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-11-18 21:07:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-18 21:07:39,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325339775] [2022-11-18 21:07:39,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325339775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099819008] [2022-11-18 21:07:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:07:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:39,794 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:39,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 21:07:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 3050 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 21:07:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 218 proven. 14 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-18 21:07:43,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:43,778 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-18 21:07:43,778 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-18 21:07:43,789 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-18 21:07:43,789 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 21:07:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 62 proven. 20 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-18 21:07:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099819008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:43,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:43,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 11] total 51 [2022-11-18 21:07:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951008612] [2022-11-18 21:07:43,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:43,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 21:07:43,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 21:07:43,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2361, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 21:07:43,872 INFO L87 Difference]: Start difference. First operand 1917 states and 2634 transitions. Second operand has 51 states, 45 states have (on average 4.022222222222222) internal successors, (181), 44 states have internal predecessors, (181), 19 states have call successors, (72), 6 states have call predecessors, (72), 12 states have return successors, (71), 17 states have call predecessors, (71), 19 states have call successors, (71) [2022-11-18 21:07:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:54,423 INFO L93 Difference]: Finished difference Result 3243 states and 4599 transitions. [2022-11-18 21:07:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-18 21:07:54,424 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 4.022222222222222) internal successors, (181), 44 states have internal predecessors, (181), 19 states have call successors, (72), 6 states have call predecessors, (72), 12 states have return successors, (71), 17 states have call predecessors, (71), 19 states have call successors, (71) Word has length 215 [2022-11-18 21:07:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:54,434 INFO L225 Difference]: With dead ends: 3243 [2022-11-18 21:07:54,434 INFO L226 Difference]: Without dead ends: 2515 [2022-11-18 21:07:54,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 462 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=825, Invalid=6485, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 21:07:54,439 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 952 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 6086 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 8033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 6086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1235 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 1425 Invalid, 8033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 6086 Invalid, 0 Unknown, 1235 Unchecked, 7.0s Time] [2022-11-18 21:07:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-11-18 21:07:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2207. [2022-11-18 21:07:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 1503 states have (on average 1.0971390552228875) internal successors, (1649), 1533 states have internal predecessors, (1649), 508 states have call successors, (508), 168 states have call predecessors, (508), 195 states have return successors, (855), 505 states have call predecessors, (855), 506 states have call successors, (855) [2022-11-18 21:07:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3012 transitions. [2022-11-18 21:07:55,007 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3012 transitions. Word has length 215 [2022-11-18 21:07:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:55,008 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 3012 transitions. [2022-11-18 21:07:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 4.022222222222222) internal successors, (181), 44 states have internal predecessors, (181), 19 states have call successors, (72), 6 states have call predecessors, (72), 12 states have return successors, (71), 17 states have call predecessors, (71), 19 states have call successors, (71) [2022-11-18 21:07:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3012 transitions. [2022-11-18 21:07:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-18 21:07:55,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:55,014 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-11-18 21:07:55,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:55,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:55,227 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -57390800, now seen corresponding path program 1 times [2022-11-18 21:07:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303271982] [2022-11-18 21:07:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:07:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:07:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:07:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:07:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:07:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:07:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:07:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:07:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:07:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:07:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:07:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:07:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:07:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:07:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:07:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:07:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:07:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-18 21:07:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-18 21:07:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-11-18 21:07:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-11-18 21:07:56,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303271982] [2022-11-18 21:07:56,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303271982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:56,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:56,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-18 21:07:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271665216] [2022-11-18 21:07:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:56,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:07:56,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:07:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:07:56,969 INFO L87 Difference]: Start difference. First operand 2207 states and 3012 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 21:07:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:59,822 INFO L93 Difference]: Finished difference Result 2947 states and 4253 transitions. [2022-11-18 21:07:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:07:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 198 [2022-11-18 21:07:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:59,834 INFO L225 Difference]: With dead ends: 2947 [2022-11-18 21:07:59,835 INFO L226 Difference]: Without dead ends: 2500 [2022-11-18 21:07:59,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:07:59,839 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 227 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:59,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 918 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 21:07:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2022-11-18 21:08:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2311. [2022-11-18 21:08:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1545 states have (on average 1.0944983818770226) internal successors, (1691), 1583 states have internal predecessors, (1691), 562 states have call successors, (562), 168 states have call predecessors, (562), 203 states have return successors, (977), 559 states have call predecessors, (977), 560 states have call successors, (977) [2022-11-18 21:08:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3230 transitions. [2022-11-18 21:08:00,697 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3230 transitions. Word has length 198 [2022-11-18 21:08:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:00,697 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3230 transitions. [2022-11-18 21:08:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 12 states have internal predecessors, (72), 5 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-18 21:08:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3230 transitions. [2022-11-18 21:08:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-18 21:08:00,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:00,701 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-18 21:08:00,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-18 21:08:00,702 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1337254478, now seen corresponding path program 1 times [2022-11-18 21:08:00,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:00,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959423638] [2022-11-18 21:08:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:00,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 21:08:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:08:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 21:08:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:08:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-18 21:08:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:08:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 21:08:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-18 21:08:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-18 21:08:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-18 21:08:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:08:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-18 21:08:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 21:08:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-18 21:08:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-18 21:08:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-18 21:08:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-18 21:08:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-18 21:08:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-18 21:08:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 21:08:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-18 21:08:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-18 21:08:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-11-18 21:08:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-18 21:08:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959423638] [2022-11-18 21:08:08,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959423638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795635231] [2022-11-18 21:08:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:08,971 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:08,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3421-4518-4004-97b9-d286cedc71aa/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 21:08:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 3036 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 21:08:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:09,988 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 21:08:09,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 15 [2022-11-18 21:08:10,245 WARN L859 $PredicateComparison]: unable to prove that (exists ((|bounded_malloc_#res.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |bounded_malloc_#res.base| 1)) (< |bounded_malloc_#res.base| |c_#StackHeapBarrier|))) is different from true [2022-11-18 21:08:10,296 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:08:10,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 21:08:11,382 INFO L350 Elim1Store]: Elim1 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 23 [2022-11-18 21:08:11,386 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 16 [2022-11-18 21:08:11,537 INFO L321 Elim1Store]: treesize reduction 106, result has 23.2 percent of original size [2022-11-18 21:08:11,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 34 treesize of output 53 [2022-11-18 21:08:11,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-18 21:08:14,077 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-18 21:08:18,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 21:08:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:08:18,746 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-18 21:08:18,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 25 [2022-11-18 21:08:18,899 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2022-11-18 21:08:18,916 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6982 (Array Int Int))) (= (store |c_old(#memory_int)| |c_save_byte_from_array_#in~storage#1.base| v_ArrVal_6982) |c_#memory_int|)) is different from true [2022-11-18 21:08:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-18 21:09:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 95 proven. 139 refuted. 0 times theorem prover too weak. 82 trivial. 2 not checked. [2022-11-18 21:09:09,049 INFO L328 TraceCheckSpWp]: Computing backward predicates...